How to Fix a Phone That Keeps Restarting by Itself

Picture this: you’re deep into a gaming session or an urgent call, and your phone that keeps restarting by itself wipes out everything. That sinking feeling hits hard as you lose progress or hang up mid-sentence. It strikes Android and iPhone users alike, turning a reliable device into a headache.

Don’t worry. This issue often stems from simple culprits like overheating, software bugs, bad apps, battery drain, full storage, or hardware faults. Your smartphone might just need a quick tweak to run smooth again.

In this guide, you’ll find step-by-step fixes tailored for Android and iPhone. We’ll cover quick tips to stop restarts now and prevention habits for the long haul. These steps require no tech skills; anyone can follow them.

Grab your phone and dive in. Follow these steps to get your phone stable again. You’ll be back to normal in minutes.

Common Causes Behind Your Phone’s Restart Loop

A restart loop can feel like a sneaky gremlin inside your device. It happens when the phone churns through power cycles without reaching a stable home screen. Understanding the root causes helps you pick the right fix faster. Below are the most common culprits, along with quick signs you can spot. Tackle these in order, starting with the simplest checks.

Software issues or glitches

Software problems are the leading cause of restart loops. A faulty update, corrupted system files, or incompatible apps can push the device into a reboot cycle. You might notice the phone boots to a certain point and then restarts, or it loops after a recent software change. In many cases, the issue resolves after updating to the latest version or performing a clean software reinstall.

What to look for:

• Recent updates that started the issue after installation.
• Apps that crash or behave unpredictably after an update.
• Occasional freezes just before a restart.

What to do:

• Check for and install any available system updates.
• Clear cache for affected apps or reinstall recently added ones.
• Boot into safe mode to confirm whether the problem is app related. If the phone stops restarting in safe mode, a third-party app is likely the culprit.
• If needed, perform a factory reset to restore the device to a clean state.

External reference: for Android users, official support tips outline steps to diagnose restarts and crashes, including safe mode testing and updating the OS. This kind of guidance helps you isolate software issues without guessing. https://support.google.com/android/answer/7664448?hl=en

Problematic apps, especially recent installs

New or recently updated apps can introduce compatibility issues, memory leaks, or background processes that force a reboot to protect the system. This is particularly common if you installed several apps in quick succession or started using a beta version of a utility.

What to look for:

• A restart loop begins soon after installing or updating an app.
• The device restarts while using a specific app or feature.
• Apps requesting unusual permissions or consuming excessive resources.

What to do:

• Uninstall recently added apps one by one, testing the device after each removal.
• Check for app updates that address known stability issues.
• Consider using the app in a limited mode or alternative to verify stability.

Physical causes and environmental factors

Hardware quirks or external factors can trigger restarts. A pressed power button is a common culprit, especially if the case or a portable charger presses it. Water exposure, moisture, or dust can also create false button presses or short circuits that push the phone into a reboot cycle.

What to look for:

• A tight or bulky case that might press the power button.
• Water exposure, including from rain, sweat, or humid environments.
• Excessive heat or cold causing abnormal power behavior.

What to do:

• Remove the case to see if the button press is the trigger.
• Dry the device completely and avoid charging in damp environments.
• If the device overheats, remove heavy apps and turn on airplane mode to reduce load while cooling.

Storage and file system problems

Low storage or corrupted system files can destabilize the operating system. When space is scarce, the phone may restart to protect itself or due to incomplete writes. Corrupted files from failed updates or interrupted backups can also lead to loops.

What to look for:

• Very low free storage left on the device.
• Frequent prompts about storage management or data corruption.
• Unusual battery drain or lag in response times just before a reboot.

What to do:

• Free up space by moving or deleting unused apps, photos, and videos.
• Use built-in storage tools to scan and repair minor file system issues if available.
• Consider backing up important data and performing a factory reset if the problem persists.

Automatic restart settings and device optimization features

Some phones include built-in restart or optimization schedules. If these features are enabled by mistake, the device can reboot at set times. This can feel like an endless loop, especially if the schedule conflicts with other processes.

What to look for:

• A scheduled restart or automatic reboot option in the settings.
• Battery optimization or maintenance tools that trigger restarts after consuming disk space or time.
• Third-party apps that promise battery or performance improvements and control reboot behavior.

What to do:

• Review and disable any auto restart or optimization schedules.
• Reset these settings to default if you’re unsure how they were configured.
• Keep the OS and apps updated, as patches often address false restart triggers.

Hardware faults and component failings

In some cases, a restart loop points to hardware issues. Faulty memory, a failing battery, or damaged motherboard components can cause the device to reset repeatedly. This is less common but can require professional service.

What to look for:

• The phone restarts even when not heavily used or charging.
• Unusual battery swelling, heat, or physical damage.
• No recent drops or water exposure but persistent restart cycles.

What to do:

• If you suspect hardware damage, contact the device manufacturer or an authorized service center.
• If the battery is user replaceable, consider testing with a known-good battery.
• Avoid DIY repairs for internal components to prevent further damage.

How to recognize a multi-factor cause

Sometimes the restart loop isn’t caused by a single issue. A software glitch can be aggravated by low storage, or a faulty app might only trigger the problem after a system update. In these cases, addressing multiple factors typically yields the best result.

What to do:

• Tackle software issues first, then free up storage and check for problematic apps.
• Test after each change to identify which factor(s) still cause restarts.
• If the loop persists, a factory reset with a careful data backup plan is often the final remedy.

Quick diagnostic checklist to run now

To speed things up, here’s a compact, practical checklist you can follow right away:

• Remove the phone case and test for button presses triggering restarts.
• Boot into safe mode to see if the device remains stable.
• Update the OS and all apps to the latest versions.
• Uninstall recently added apps and test again.
• Free up storage until at least 10–15% free space remains.
• Check for any auto-restart or maintenance settings and disable them.
• If the issue persists, back up data and perform a factory reset.

External reference for Android users on troubleshooting restarts and crashes, including safe mode testing and updates: https://support.google.com/android/answer/7664448?hl=en

Images that fit this section

Photo by Kelvin Valerio

Quick Fixes to Stop Restarts Right Away

If your smartphone keeps rebooting, you want fast, practical steps that you can act on now. This section lays out quick actions you can take to stop the restart loop in its tracks. Use these as a first line of defense before diving into deeper troubleshooting. Think of it as a triage for your device.

1) Reboot with a purpose: force restart and symptom check

A force restart can clear a stuck state without erasing data. It’s simple and often effective. Try a standard soft reset first, then a forced restart if needed. If your device responds after a force restart, monitor briefly to see if the issue recurs.

• How to perform a soft reset: hold the Power button for 10 to 20 seconds until the device reboots.
• How to force restart on non-responsive devices: press and hold the Power button and Volume Down (varies by model) until the logo returns.

If the reboot loop stops after a force restart, you likely faced a temporary glitch. Keep note of any actions you took just before the loop started. For Android users, there’s guidance on diagnosing restarts and using safe mode to isolate software issues. https://support.google.com/android/answer/7664448?hl=en

2) Boot into safe mode to separate software from hardware

Safe mode disables third-party apps, letting you test whether the problem lies with an app. If the phone stays stable in safe mode, a recent app or service is the likely culprit. If it still restarts, you may be dealing with a deeper software issue or hardware fault.

• Android: Safe mode varies by device. Check your manufacturer’s instructions or the Google support page to learn the exact steps for your model. If stability returns in safe mode, start removing apps installed or updated recently.
• iPhone: Safe mode isn’t a built-in option, but you can replicate a clean software state by updating iOS, removing questionable apps, and performing a reset if needed.

If safe mode doesn’t help, explore other quick fixes or consider a factory reset as a last resort after backing up data. For Android users, you can find steps to find problem apps by rebooting to safe mode here: https://support.google.com/android/answer/7665064?hl=en

3) Update software and apps to the latest versions

Outdated software and apps are a common source of reboot loops. Updates fix known bugs and improve compatibility. Start with the system update, then review each installed app for available updates. After updating, restart the device and observe for any recurrence.

• Check for OS updates in Settings > System > Software update (or the equivalent on your device).
• Update all apps in the app store, starting with those you use most.
• If you recently updated a particular app before the restarts began, prioritize removing or rolling back that app.

If you suspect a software mismatch, a clean reinstall or factory reset may be necessary after backing up your data. For more on Android update checks, see official troubleshooting steps here: https://support.google.com/android/answer/7664448?hl=en

4) Free up storage and repair minor file system issues

Low storage can trigger instability and restarts. Free space to give the system breathing room. Use your built-in storage tools to identify and remove large or duplicate files, and consider offloading media to the cloud or a computer.

• Aim for at least 10–15% free space as a practical threshold.
• Clear cache and temporary files for apps that are known to accumulate data.
• If your device offers a built-in disk check or repair tool, run it to address minor corruption.

If the reboot persists after freeing space, you may need a deeper reset. See how storage problems can contribute to reboot loops and how to address them effectively: https://www.avg.com/en/signal/why-does-my-phone-keep-restarting

5) Uninstall recent or suspicious apps

New apps or updates can trigger restarts due to background processes or poor optimization. If the loop began after installing or updating an app, remove it and test the device.

• Start with the most recently installed or updated apps.
• Refrain from reinstalling the app until you confirm the reboot issue is gone.
• If you rely on a particular app for essential functions, look for alternative versions or official updates from the developer.

If you’re unsure which app is the culprit, a systematic uninstall-and-test approach works well. For a deeper look, Android support suggests steps to find problem apps by rebooting into safe mode and testing post-removal: https://support.google.com/android/answer/7665064?hl=en

6) Review hardware indicators and external factors

Hardware can cause restarts, especially if the device overheats, has a swollen battery, or suffers from moisture. Quick checks can reveal obvious triggers.

• Remove any bulky or tight cases that might press hardware buttons.
• Avoid charging in damp environments; dry the device if it’s wet.
• Monitor heat. If the device overheats, reduce workload and give it a break.

If you notice physical damage or persistent heat, a professional inspection may be needed. Hardware faults are less common but can require service from the manufacturer or an authorized center.

7) Reset settings or perform a careful factory reset

If none of the quick checks fix the issue, resetting to defaults can clear stubborn software problems. Start with a settings reset, then proceed to a full factory reset only after backing up all important data.

• Reset settings: this returns system preferences to default without erasing personal data.
• Factory reset: wipes all data; use this as a last resort if you have a clean backup plan.

A factory reset often resolves multi-factor restart loops by returning the device to a known-good state. If you’re considering this route, plan the backup carefully and choose the option that preserves essential information.

8) How to proceed when the problem seems multi-factor

Sometimes a reboot loop is not caused by one issue. Software glitches can be worsened by low storage or a problematic app. In these cases, address multiple factors in sequence and test after each change.

• Tackle software issues first, then free up storage and check for problematic apps.
• After each step, reboot and observe whether the issue returns.
• If the loop persists, a factory reset with a careful data backup plan is often the final remedy.

Quick diagnostic checklist to run now

To speed things up, keep this compact checklist handy. Work through it in order and test after each item.

• Remove the phone case and test for button presses triggering restarts.
• Boot into safe mode to see if the device remains stable.
• Update the OS and all apps to the latest versions.
• Uninstall recently added apps and test again.
• Free up storage until at least 10–15% free space remains.
• Check for any auto-restart or maintenance settings and disable them.
• If the issue persists, back up data and perform a factory reset.

External reference for Android users on troubleshooting restarts and crashes, including safe mode testing and updates: https://support.google.com/android/answer/7664448?hl=en

Images that fit this section

Photo by Kelvin Valerio

Step-by-Step Fixes for Android Phones That Keep Restarting

If your Android phone keeps rebooting, you’re not alone. Many restarts are provoked by simple hiccups that you can fix quickly. Below are three focused sections with practical, step-by-step guidance. Use these in order, testing after each step to see if the problem disappears. The goal is to restore stability without losing data.

Boot into Safe Mode and Remove Bad Apps

Safe Mode lets you test the phone without third-party apps running. If restarts stop in Safe Mode, a recently installed or updated app is likely the culprit. Here’s how to enter Safe Mode on most Android devices and what to do next.

• How to enter Safe Mode: press and hold the Power button, then tap and hold “Power Off” or “Restart” until you see the option to reboot into Safe Mode. Confirm the choice. Your screen will show Safe Mode in the corner.
• Test for stability: use the device for a while. If it stops restarting, the issue is tied to a third-party app.
• Uninstall recent apps: start with the most recently installed or updated apps. After each removal, reboot and observe. If the device remains stable, you’ve found the culprit.
• Why this helps: third-party apps can conflict with system services, cause memory leaks, or background processes that trigger reboots.
• Next steps if Safe Mode helps: remove the problematic app(s) completely, then update the remaining apps and the OS.

For additional guidance, Android’s official troubleshooting tips cover safe mode testing and software updates to isolate software issues. How to diagnose restarts and crashes on Android

Update Software and Clear Cache Partition

Software updates fix bugs and improve compatibility, which can stop restart loops. Clear cache partition to remove stale system files that might cause crashes. Here’s how to proceed with both steps.

• Check for OS updates: Settings > System > Software update (device-specific paths may vary). Install any available updates.
• Update apps: open the Play Store, check for updates, and install the latest versions, especially for apps you use often.
• Clear cache partition: power off the device, then hold Power and Volume Up to enter Recovery Mode. Use the volume keys to select “wipe cache partition” and confirm with Power. This action does not erase personal data and can resolve temp files that trigger reboots.
• What you’ll gain: a cleaner system state without data loss, often resolving glitches introduced by bad caches or misbehaving apps.
• When to proceed to deeper resets: if restarts persist after updates and a cache wipe, a factory reset may be necessary after backing up important data.

If you want deeper steps on Android updates, you can review official guidance here: How to Factory Reset Your Phone and System Settings | Android

Free Space, Check Battery, and Reset if Needed

Low storage, a tired battery, or a stubborn software fault can all trigger restarts. This section covers efficient storage cleanup, battery checks, and safe reset options to get you back on track.

• Free up storage wisely: aim to keep at least 10–15% free space. Remove large apps you rarely use and offload photos or videos to the cloud or a computer.
• Clear cache and data: for apps that accumulate a lot of temporary files, clearing cache can reduce strain on the system.
• Check battery health: if the device swells, heats excessively, or runs down unusually fast, replace the battery if it’s user replaceable or seek professional service.
• Storage health and system stability: running out of space can cause system processes to stall, leading to restarts.
• Lightweight reset steps before a full reset: reset settings to defaults to clear misconfigured options, while preserving personal data. If the problem persists, perform a factory reset after backing up.
• Factory reset as a last resort: this option wipes all data and returns the device to a clean state. It often fixes deep software problems that other steps miss. Prepare a reliable backup first, then follow the device’s Recovery Mode path to perform the reset.
• Post-reset: reinstall essential apps gradually and test the device after each installation to catch a repeat of the issue early.

If you want to review factory reset guidance from Google, see: Reset your Android device to factory settings

By methodically running through these steps and testing after each change, you can usually restore stability. If the reboot loop continues after a factory reset, it’s time to seek professional diagnostics, as there may be a hardware problem. For quick reference, you can also visit additional Android reset guidance such as Factory Reset Android Phone Guide or related support articles from major providers.

Step-by-Step Fixes for iPhones Stuck in Restart Loops

When your iPhone keeps restarting, it can feel like you’re stuck in a loop with no clear end in sight. The fixes below are arranged from quick wins to more thorough steps. Each move aims to restore stability without risking data. Follow them in order and test the device after each step. A calm, methodical approach often reveals the root cause faster than random tapping.

1) Force Restart and Update iOS

A force restart can clear a stuck state without erasing data. It’s quick and often effective. If the phone responds, monitor for a while to see if the loop returns.

• Force restart sequence: press and release the volume up button, press and release the volume down button, then press and hold the side button until the Apple logo appears.
• After the device restarts, check for a software update. Go to Settings > General > Software Update and install any available update.
• Why this helps: minor glitches can lock the system in a loop. A clean reboot flushes temporary failures and applies pending fixes from the update.

If the restart loop persists, move to the next step. For detailed Apple guidance on stuck iPhone issues and recovery options, see Apple support resources such as “If your iPhone is stuck on the Apple logo.” You can review related steps here: https://support.apple.com/en-us/102474

2) Manage Apps, Storage, and Battery Health

Apps, storage pressure, and battery health all influence reboot behavior. Freeing space and trimming problematic apps can pause a loop long enough to diagnose clearly.

• Delete apps you rarely use or recently installed before the issue started. Offload apps to reclaim space without deleting data.
• Check battery health by going to Settings > Battery > Battery Health. A degraded battery can trigger unexpected shutdowns and restarts.
• Signs of a bad battery include quick drops in charge, swelling, or the device shutting down at 50% charge. If you suspect the battery is failing, consider replacement options through Apple or an authorized service provider.
• What to monitor after changes: observe system responsiveness, app stability, and whether the device restarts during heavy tasks or idle moments.

If you need a bit more context on Apple’s guidance for iPhone reset settings and defaults, Apple’s official article on resetting iPhone settings to defaults offers clear steps: https://support.apple.com/en-by/guide/iphone/iphea1c2fe48/18.0/ios/18.0

3) Reset Settings or Factory Reset as Last Steps

If the problem remains after the quick checks, a reset can clear stubborn software conflicts. Start with a settings reset and then consider a full erase only after backing up your data.

• Reset all settings first: Settings > General > Reset > Reset All Settings. This returns system preferences to default while keeping your data intact.
• If the issue still persists, perform a full factory reset. Before you do, back up everything to iCloud or your computer. Then restore from the backup after the reset.
• When to contact Apple: if the restart loop continues after a factory reset, hardware could be involved. Apple Support can guide you through next steps or arrange service.
• Practical tip: a reset clears many misconfigurations that can trigger restarts, but it also reshuffles settings like Wi‑Fi networks and wallpaper. Plan to reconfigure those after the reset.

For official guidance on resetting iPhone settings and performing a factory reset, you can read about restoring and resetting processes on Apple’s support site: https://support.apple.com/en-us/guide/iphone/iphea1c2fe48/18.0/ios/18.0

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If you’d like to add more depth to this section later, consider including a brief troubleshooting flowchart for iPhone restart loops and a quick comparison of signs that point to software versus hardware causes. Also, linking to practical recovery steps from trusted sources helps readers who want to act confidently. For further reading on Apple supported recovery paths and recovery mode steps, see the Apple discussions thread on boot loops: https://discussions.apple.com/thread/254891668

Remember, keeping a recent backup is your safety net. If you need a hand with any step, I’m here to walk you through it.

Prevent Future Restarts and Know When to Get Help

Even after you’ve fixed the immediate reboot loop, you want to prevent it from coming back. This section helps you build durable stability into your smartphone experience and shows you when it’s time to seek professional help. Think of it like regular maintenance for a car: a few small habits now save bigger problems later. We’ll cover practical prevention tips, smart monitoring habits, and clear signs that indicate you should bring in a pro.

Establish a habit of proactive maintenance

Prevention starts with simple, repeatable actions. Set up a regular check routine so your phone stays healthy without taking over your day.

• Keep software current: enable automatic OS and app updates when possible. Updates fix bugs that can cause restarts and improve compatibility.
• Clear storage periodically: aim to keep at least 10–15% free space to prevent system slowdowns that can trigger reboots.
• Manage battery health: monitor battery performance and replace aging cells when needed. A worn battery is a common restart trigger.
• Watch for rogue apps: install only trusted apps and review permissions. Uninstall anything unnecessary or recently updated if issues reappear.
• Limit background tasks: disable unnecessary processes or features that run in the background and stress the system.

A practical takeaway is to treat your phone like a small computer. Regular software updates, adequate storage, and mindful app management go a long way toward preventing restart loops. For Android users, official guidance emphasizes keeping the OS up to date and testing stability after updates: Fix an Android device that’s restarting or crashing. For iPhone users, staying current with iOS updates and monitoring battery health can help reduce reboot events.

Build a quick monitoring routine

When you notice a restart, having a quick plan helps you identify the cause fast. A simple, repeatable sequence saves time and reduces frustration.

• Note the context: what were you doing when the restart happened? Was the device under heavy use, charging, or in a hot environment?
• Observe patterns: does the reboot occur after a specific app launch, after an update, or during a certain time of day?
• Test in safe mode when possible: if your phone stays stable with third-party apps disabled, you know the issue is app related.
• Track battery behavior: note charging cycles and any swelling, quick drops, or abnormal heat.

If you suspect hardware issues, don’t press your luck. A pattern of restarts under light use or while charging can point to battery or motherboard problems. In many cases, a professional diagnostic is the fastest route to a lasting fix. For Android users, safe mode testing and updates are commonly recommended steps by Google’s support resources: Fix an Android device that’s restarting or crashing. For iPhone, tracking battery health in Settings > Battery > Battery Health provides a clear read on whether battery replacement is warranted.

Avoid common pitfalls that invite restarts

Certain habits and trigger points make restarts more likely. Being aware of them helps you steer clear.

• Overheating: playing graphics-heavy games, using power-hungry apps, or live streaming for long periods can push temperature high. Letting the device cool down and reducing workload during gaming sessions prevents thermal resets.
• Faulty or beta software: testing beta builds or using apps from untrusted sources increases risk. Stick to official releases, especially on your primary phone.
• Poor charging practices: using damaged chargers, charging in hot environments, or charging while the device is in a case that traps heat can provoke restarts.
• Hidden storage issues: large caches, temp files, and duplicated media can make the system unstable. Regularly offload or prune unused data.

Beyond individual habits, pairing preventative care with reliable backups creates a safety net. If the worst happens and you must reset, you won’t lose precious memories or important information. For Android readers, trusted guidance on troubleshooting restarts and crashes is available here: Fix an Android device that’s restarting or crashing. For iPhone users, Apple’s support pages offer structured steps to reset settings or perform a full restore when needed: If your iPhone is stuck on the Apple logo.

Know when to seek professional help

Most restart loops can be solved with software fixes and careful maintenance. But some signs require professional attention.

• Persistent restarts after a factory reset: if the device still reboots after a full wipe, hardware is likely involved.
• Sudden battery swelling or heat during normal use: this is a red flag for a potentially dangerous battery issue.
• Physical damage without a clear software cause: drops, water exposure, or damaged connectors can cause hard-to-diagnose restarts.
• Inability to boot into recovery or access essential data: when you can’t back up or restore data safely, professional help is wise.

Choosing the right path matters. If you’re unsure, start with a diagnostic from an authorized service center or the device manufacturer. This protects your data and reduces the risk of accidental further damage. For iPhone users facing persistent loops, Apple Support can guide you through next steps or arrange service if needed: Apple Support – boot loop guidance. Android users can also find structured guidance on diagnostics and repairs from Google and manufacturer resources: Android restart troubleshooting.

A concise preemptive checklist you can save

Use this quick reference to prevent future restarts. It blends the essentials into a single, actionable list.

• Keep software up to date and review app updates regularly.
• Maintain 10–15% free storage to keep the system responsive.
• Monitor battery health and replace aging batteries when needed.
• Avoid beta software and only install trusted apps.
• Watch for overheating and remove heavy loads when the device gets hot.
• Back up data routinely so you can reset with minimal loss if needed.

If you want extra guidance on Android updates and recovery, see official steps on factory resets and device resets here: How to Factory Reset Your Phone and System Settings | Android.

Useful resources and quick reads

• For Android troubleshooting and safe mode steps, Google’s support article is a solid reference: Fix an Android device that’s restarting or crashing.
• For iPhone related boot loops and recovery paths, Apple’s official guidance covers both basic resets and when to seek help: If your iPhone is stuck on the Apple logo.
• A practical troubleshooting guide that covers common restart causes and fixes: Why Does My Phone Keep Restarting? 9 Ways to Fix It.

Images that fit this section Photo by Vlad https://www.pexels.com/@vlad-1445510816

Transitions from here into the next sections If your device still restarts after following these steps, you’ll find deeper, model-specific guidance in the next sections. We’ll split into Android focused fixes and iPhone focused fixes, with clear, step-by-step instructions that you can follow in sequence. Each path ends with a robust decision point: restore data, replace a component, or seek professional service.

Conclusion

Most restart loops can be fixed at home with a calm, methodical approach. Start with quick wins like force restarts, safe mode testing on Android, and updating essential software, then move to storage cleanup and app audits. Back up your data first, because resets and software changes carry some risk.

If the issue persists, follow the platform specific steps you’ve learned, and don’t skip the backups. A careful factory reset is a last resort that often resolves stubborn software problems, but only after you’ve saved your important files. If you notice signs of hardware trouble, seek professional service to protect your data and device.

A reliable smartphone is a key helper in daily life, so a little prevention goes a long way. Keep software up to date, monitor storage and battery health, and limit risky apps. If this guide helped, share your results in the comments and tell us which step made the difference. Looking ahead, you’ll find more on battery care and long term maintenance in our upcoming posts. Thanks for reading and good luck with your device.