Calls Keep Dropping on Android? Fix Random Call Disconnects Safely

If calls keep dropping on Android, the fastest fix is not a factory reset. First determine whether the disconnect follows a location, one SIM/eSIM, Wi-Fi Calling, a specific network mode, or the phone itself. Random call drops can come from coverage and tower handoffs, carrier provisioning, SIM problems, network settings, software, or—less commonly—hardware.

This guide follows a low-risk diagnostic order: reproduce the symptom, separate carrier/network problems from device problems, test simple radio changes, then move to network resets or service only when the evidence supports them. Menu names vary by Android version, manufacturer, carrier and country.

1. Identify exactly when the call drops

Make two or three short test calls in different conditions. Note whether calls fail only in one building or neighborhood, only while moving, only on one SIM, or at a similar elapsed time. If the problem is location-specific, weak coverage, congestion or a cellular handoff is more likely than a Phone app problem.

If calls, SMS and mobile data all fail together, start with the network rather than clearing app data. Our Mobile Data Not Working on Android guide covers the broader cellular-data path.

2. Check signal and compare another location

Move outdoors or to another known-good coverage area and repeat the call. Buildings, terrain and local network load can affect radio conditions. Samsung’s current support guidance explicitly lists network conditions and mobile-network configuration among the causes of unexpected call disconnections.

Do not treat the number of signal bars as a complete diagnosis. A phone can show service and still encounter congestion or a failed handoff. The useful test is whether the same phone and line become stable in another location.

3. Toggle Airplane mode, then restart

Turn Airplane mode on briefly, turn it off, wait for the phone to register with the mobile network, then place another call. If the problem continues, restart the phone. These steps refresh temporary radio state without deleting saved Wi-Fi networks, Bluetooth pairings or personal data.

4. Verify the SIM/eSIM and carrier account

If you use dual SIM, confirm which line is handling the call. A recently transferred eSIM, damaged physical SIM, suspended account or incomplete carrier provisioning can create intermittent service. If Android reports no SIM, emergency calls only, or repeated registration loss, use our Android SIM and eSIM detection guide before changing unrelated settings.

When practical, ask the carrier to confirm that voice service and the line’s provisioning are active. Testing the SIM in another compatible phone can also help separate the line/SIM from the original handset.

5. Test Wi-Fi Calling separately

If calls drop mainly at home, work or another place where Wi-Fi Calling is active, temporarily turn Wi-Fi Calling off and repeat the same call over cellular. Samsung specifically recommends this comparison for frequent dropped calls. Availability and menu names depend on the carrier and device.

If cellular calls are stable but Wi-Fi Calling fails, investigate the Wi-Fi connection and carrier’s Wi-Fi Calling service rather than resetting the entire phone. If both paths fail, continue below.

6. Install pending Android and manufacturer updates

Install pending system updates over a reliable connection and restart. Manufacturer updates can include modem, telephony and stability changes. If an update itself refuses to download or install, follow our Android System Update Failed guide instead of repeatedly forcing the update.

7. Check the available network mode

Some Android builds expose a network-mode selector under Mobile networks. Samsung notes that the selected mode may not connect properly in every carrier environment and recommends testing another available mode when calls keep disconnecting. Do not force an unsupported mode or copy hidden-menu settings from another model.

If the phone also remains stuck on LTE/4G when you expect 5G, keep that diagnosis separate: see 5G Not Working on Android.

8. Reset mobile network settings only after the checks above

On current Galaxy software, Samsung documents a dedicated Reset mobile network settings option under General management → Reset. Other Android manufacturers may combine mobile, Wi-Fi and Bluetooth resets, so read the confirmation screen before proceeding.

A network reset can remove customized network configuration and may require APN or carrier settings to be restored. It does not justify jumping directly to a factory reset.

9. Use device diagnostics when available

Samsung Members includes a Mobile network diagnostic on supported Galaxy devices. Run it after reproducing the problem. Other manufacturers may provide their own hardware or connectivity diagnostics. A diagnostic failure gives you stronger evidence to take to the carrier or service center than a vague report that calls sometimes drop.

10. Separate carrier, SIM and hardware before factory reset

If calls still disconnect, compare systematically: the same SIM in another compatible phone, another known-good SIM in the affected phone when permitted, and the affected phone in a different coverage area. If the problem follows the SIM or account, contact the carrier. If it follows the handset across lines and locations, device service becomes more plausible.

Inspect the phone for physical or liquid damage if the issue began after a drop or exposure. Back up important data before any repair or factory reset. A factory reset should be a late-stage test, not the first response to a cellular symptom.

What the pattern usually suggests

• Drops only in one area: coverage, congestion or tower handoff.
• Drops mainly on Wi-Fi Calling: local Wi-Fi or carrier Wi-Fi Calling path.
• Calls, SMS and data fail together: registration, SIM/eSIM, account, outage or radio issue.
• Problem follows the SIM to another phone: SIM, account or carrier provisioning.
• Problem stays with the phone across SIMs and locations: device configuration, software or hardware becomes more likely.

Official sources

• Samsung Support: Troubleshoot call disconnections and no network signal
• Samsung Support: Galaxy phone is unable to make or receive calls
• Samsung Support: Detect dropped-call issues

Last reviewed: September 24, 2026. Calling features, VoLTE/5G behavior, Wi-Fi Calling, network-mode controls and reset scope vary by carrier, country, Android version and device model.

Featured image: Imad Clicks / Pexels, Photo ID 30466752, used under the Pexels License. Original source: https://www.pexels.com/photo/man-using-modern-smartphone-for-communication-30466752/