Why Your Mobile Data Drops When You Get a Call and How to Fix It

If you rely on data while you talk, a dropped connection during incoming calls can feel frustrating. It slows your work, interrupts messages, and leaves you guessing what went wrong. The good news is most data drops during calls are solvable with a few targeted steps. This guide walks you through practical checks, easy fixes, and how to tell when it’s time to call your carrier.

As you read, you’ll find clear actions you can take on your smartphone. We’ll cover settings you can adjust, how to test different hypotheses, and what to do if a replacement SIM or a different device is needed. Let’s get you back to smooth data while you stay connected on calls.

What causes data to drop during a call

Understanding the culprit helps you pick the right fix. In most cases the issue boils down to how your network handles voice and data traffic.

• VoLTE status. When your carrier supports Voice over LTE (VoLTE) and it is enabled, voice calls use the same LTE network as data. If VoLTE is off, your phone may switch to a slower 3G or even 2G connection for calls, which interrupts data sessions.
• Network mode and handoffs. If your phone is set to a mixed mode or to a non LTE preferred setting, the moment a call arrives your data channel might pause while the voice channel takes over.
• Signal strength. A weak signal makes handoffs between towers unstable. Calls may still connect, but data can stall during the transition.
• Carrier plan and features. Some plans handle data and voice differently. If your plan has limited data while on calls or if you’re roaming, you may see more drops.
• Device and SIM health. A faulty SIM or a worn microphone antenna can degrade both voice and data quality. In a smartphone this is more common after a long period of use or exposure to heat.

If your issue happens only sometimes or in certain locations, the problem is often signal related. If it happens consistently no matter where you are, start with settings and carrier options.

Quick fixes you can try today

These steps are fast to perform and often fix the problem without touching complex settings.

• Enable VoLTE if your carrier supports it. This is the most direct fix. Go to your phone’s settings and turn on VoLTE or Voice over LTE for calls.
• Check data during calls setting. Some phones offer a specific toggle like “Use data network while on call.” Make sure this is enabled.
• Turn on WiFi calling if you have reliable home or office WiFi. If your carrier supports it, WiFi calling routes voice over the internet when cellular data is unstable, keeping you connected.
• Toggle Airplane mode briefly. Turn on Airplane mode for about 15 seconds, then turn it off. This resets the radio and can reestablish a clean data path.
• Update carrier settings. Carriers push small updates that improve voice and data handling. Check for updates in settings and install them if available.
• Reboot the device. A quick restart clears minor glitches in the radio stack and can restore normal data behavior.
• Check the SIM card. Remove and reinsert the SIM card or try a different SIM if you have one. A loose or dusty slot can cause instability.
• Keep software current. Install the latest operating system update and app updates. Bug fixes can resolve data behavior during calls.

If you use a smartphone with dual SIMs, test with a single SIM first. If the problem disappears, the issue may involve one of the SIMs or how the device switches between them.

How to check and adjust settings on Android and iPhone

Two major families of devices use different menus. The steps below are designed to be straightforward, so you can follow along without hunting through menus for long.

Android devices

• Verify VoLTE is on. Settings > Network & internet > Mobile network > Voice and data. Enable VoLTE for calls if your device shows it.
• Confirm data during calls. Settings > Network & internet > Mobile network > Use data during calls (or similar). Make sure it is enabled.
• Review preferred network mode. Settings > Network & internet > Mobile network > Preferred network type. Choose LTE/4G auto or a similar option that prioritizes LTE for both data and voice.
• Check for carrier updates. Settings > About phone > System updates or Software updates. Tap Carrier or SIM updates if present.
• Disable battery saver during calls. Battery saver can limit activities in the background and interfere with data in use during a call.
• Test with a different network mode. If you have unstable data, temporarily switch to 3G/4G manually to compare performance. If data improves on one mode, that helps narrow the cause.

iPhone devices

• Turn on VoLTE. Settings > Cellular > Cellular Data Options > Voice & Data, choose VoLTE On.
• Make sure data is allowed during calls. In the same menu, ensure the option to use data during calls is enabled when offered.
• Use WiFi Calling if available. Settings > Phone > WiFi Calling, turn it on. This can keep calls active via WiFi when cellular data is weak.
• Check for iOS updates. Settings > General > Software Update. Install any available updates.
• Reset network settings if issues persist. Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. Note that this resets saved WiFi networks, passwords, and Bluetooth connections.
• Consider a test with a fresh profile. If possible, back up data and try the device with a different SIM to see if the problem follows the SIM or stays with the phone.

In both ecosystems, keeping the device within a strong signal area helps. If you’re inside a building with poor coverage, data drops during calls are more likely.

Carrier and network related checks

Sometimes the fix lies outside your device and in the network you connect to.

• Verify your VoLTE compatibility. Check your carrier’s website or contact support to confirm your plan supports VoLTE in your region and that it is active on your line.
• Review roaming status. If you travel or use a secondary SIM, roaming can cause occasional data hiccups. Ensure roaming is properly configured and your plan supports it.
• Run a data test at different times. Try data while receiving a call at different times of the day to determine if congestion is the culprit.
• Try another SIM or network. If you have access to a different SIM in the same phone, or try your SIM in another phone, you can tell if the issue is the SIM, the phone, or the network.
• Contact customer support. If your issue persists across devices or locations with the same SIM, your carrier may need to adjust settings on their end.

If you rely on a carrier app for data usage controls, these apps can sometimes override system settings. Review any third party tools that manage data usage or network preferences.

Advanced troubleshooting steps

When basic fixes don’t help, these deeper checks can uncover stubborn causes.

• Inspect the physical environment. Interference from thick walls, elevators, or crowded urban areas can weaken signals. If the problem occurs in a specific building, the issue may be indoor coverage rather than your device.
• Test in airplane mode with a full reset. Turn on airplane mode for 30 seconds, then off. Reconnect to the network and watch how data behaves during a call.
• Check for background data restrictions. Some apps restrict data in the background when a call comes in. Review data saver settings and app specific permissions.
• Evaluate VPN usage. A VPN can add latency or drop data during calls. Temporarily disable VPN to see if that stabilizes the connection.
• Review battery and performance modes. Power saving modes can throttle network use. Temporarily set to a standard performance profile to test changes.
• Consider hardware aging. Over time the antenna or SIM reader can degrade. If you notice other radio issues like weak WiFi or Bluetooth drops, it may be hardware related.

If a hardware issue is suspected, visiting an authorized service center or trying a factory reset as a last resort may be warranted after backing up data.

When to seek professional help

If the problem continues after you complete the steps above, it’s time to involve experts.

• Contact your carrier. Explain exactly when the data drop happens and what you have already tested. Ask for a fresh network profile or a dedicated diagnostic to rule out a network problem on their side.
• Visit a store with a working phone. If possible, bring your device and ask for a hands on test with a different SIM to determine whether the issue is device or network related.
• Consider a warranty or replacement. If the device shows no improvement across multiple networks and SIMs, there might be a hardware fault. Check warranty status and explore replacement options.

Having a clear log of times and locations where the problem occurs helps a lot. A simple notebook noting the date, time, network mode, and a short description can speed up the investigation.

Preventive steps and best practices

A little planning goes a long way in keeping data stable during calls.

• Keep VoLTE enabled. If your carrier supports it, keeping VoLTE on reduces the chance of data dropping during incoming calls.
• Use WiFi calling when possible. A reliable home or office network provides a steady backup if cellular coverage falters.
• Regularly update device software and carrier settings. Small fixes compound into smoother performance.
• Monitor signal strength in busy areas. If you notice persistent drops in a particular building or route, you may benefit from using a WiFi network or changing your carrier plan.
• Protect the SIM and the tray. A loose SIM can cause intermittent issues. Handle it with care and ensure it sits firmly.
• Consider a data plan that matches your usage. If you rely heavily on data during calls, a plan that prioritizes data and supports VoLTE can reduce surprises.

For everyday users, the goal is to have a reliable data path that stays active during voice transmissions. When a smartphone behaves consistently, you can focus on your tasks rather than troubleshooting.

A practical, step by step playbook

If you want a simple checklist to follow, use this sequence.

1. Check VoLTE and data during calls settings on your device.
2. Enable WiFi calling if available and test in both WiFi and cellular environments.
3. Update carrier settings and OS, then reboot.
4. Re-seat or replace the SIM card to rule out contact issues.
5. Test with a different SIM or another phone to isolate the problem.
6. If needed, reset network settings or perform a factory reset as a last resort after saving data.

This approach emphasizes method and clarity. It helps you quickly confirm whether the fault lies with the phone, the SIM, or the network.

Real world example

A customer using a midrange Android phone noticed data would vanish whenever a call came in. After confirming VoLTE was off, she enabled it and turned on data during calls. A quick carrier settings update followed. A restart and a SIM re-seat completed the fix. The problem never returned. The lesson is simple: start with the easiest fixes and move toward deeper checks only if needed.

Smartphones today often rely on a mix of technologies to keep you connected. A small setting change can have a big effect on your daily rhythm. Keeping a few robust checks in your pocket means you’ll know how to react when the next call comes in.

Conclusion

Data stability during calls matters for both work and personal life. By understanding how voice and data share the same network, you can choose the right fixes quickly. Start with VoLTE and data during calls, then check carrier settings and network mode. If questions linger, test with another SIM or another device to identify the root cause. With the right approach, you’ll keep data active and conversations uninterrupted, wherever you are.

If you found this guide helpful, share it with friends who rely on constant data during calls. And if you have a tip that worked for you, drop it in the comments so others can benefit. Your smartphone should connect you, not complicate your day.