Why Your Android Phone Keeps Losing Signal

If your Android phone keeps dropping to No Service or a single bar, the fastest fix is to toggle Airplane mode on, wait about 20 seconds, then turn it off — that forces the phone to release its tower and grab the strongest one nearby. If signal returns but keeps failing, the usual causes are a loose SIM, a shaky 5G-to-LTE handoff, or stale network settings. Drops that begin the day your phone updated to Android 16 or One UI 8 usually point at a reset preferred-network setting or a confused radio rather than a hardware fault, so on a phone that was fine until the update a network-settings reset is worth trying sooner than usual.

Start with the quick resets#

Try these first, in order.

• Toggle Airplane mode. Open Quick Settings, tap the airplane icon, wait about 20 seconds, tap it off.
• Power off, don’t just restart. Google recommends powering off, waiting 30 seconds, then powering back on, per its Pixel connectivity guide.
• Reseat the SIM. Eject the tray, check for dust or misalignment, seat it firmly, and reinsert.

Rule out the case, coverage, and 5G#

Walls, buildings, and thick cases can block mobile service, so remove the case as a test; drops that cluster in one spot usually mean weak coverage.

Patchy 5G is another offender: in a weak-5G area the phone stutters as it hunts between 5G and LTE. On many phones you can set a preferred network type — on stock Android under Settings > Network & internet > SIMs — and choosing LTE/4G stops the hand-offs. Android Police’s guide to forcing LTE or 5G shows where it sits on your model.

Reset network settings#

Still dropping? Reset the mobile network stack: it clears saved carrier data and re-pulls it fresh. Photos and apps stay, but saved Wi-Fi and Bluetooth pairings may go.

Task	Pixel / stock Android	Samsung Galaxy
Reset network	Settings > System > Reset options > Reset mobile network settings	Settings > General management > Reset > Reset mobile network settings
Update software	Settings > System > System update	Settings > Software update > Download and install

If calls are fine but data is the problem, work through mobile data not working on Android too.

When it’s the carrier or the hardware#

If nothing holds, the cause may be outside the phone. Confirm your account is active, install any pending software or carrier update, and ask your carrier about a local outage — Samsung’s poor-signal page ends by pointing you back to your carrier. A phone that keeps searching for a tower also drains its battery fast. If no service persists after a reset, the SIM or antenna may be faulty, and a carrier store can test with a known-good SIM.

Common questions#

Why does my phone keep losing signal after the One UI 8 update?#

A major update can reset the preferred network type or leave the radio in a bad state. On a Galaxy, reset the mobile network under Settings > General management > Reset > Reset mobile network settings, then install any pending software or carrier update from Software update.

My Pixel keeps dropping to No Service. What is the fastest fix?#

Toggle Airplane mode on, wait about 20 seconds, then turn it off, which forces the phone to release its tower and grab the strongest one nearby. If it keeps returning, power the phone fully off for 30 seconds rather than just restarting, which is what Google recommends.

Why does my signal drop only in certain rooms or spots?#

Walls, metal, and thick cases block cellular service, so drops that always cluster in the same place point to weak coverage there rather than a phone fault. Remove the case as a test, and step toward a window or outside to confirm.

Does forcing LTE instead of 5G stop the drops?#

In a weak-5G area the phone stutters as it hand-offs between 5G and LTE, and setting the preferred network type to LTE/4G stops that hunting. On stock Android it sits under Settings > Network & internet > SIMs, though some carriers hide or lock the menu.