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Android Phone Keeps Restarting? 9 Fixes to Stop the Loop (2026)

October 24, 2026

It starts on the desk: your phone buzzes, and it is sitting on the boot logo, restarting itself for no reason. Then it begins doing it mid-call, in your pocket, or worst of all in a loop — logo, black screen, logo, black screen. If your phone keeps restarting like this, hold off on the factory reset: a restart loop has two very different families of causes, and a reset wipes your data without telling you which family you are in.

Family one is software: a misbehaving app, a bad update, or storage so full the system cannot breathe. Family two is hardware: a worn battery that can no longer deliver peak power, a stuck power button, a failing board. This guide is a diagnostic ladder that splits those families first — Safe Mode is the test, not a fix — then works through cheap software repairs and honest hardware checks, including the one finding that means stop DIY immediately: a swollen battery. Covers Android 10 through 14.

Android phone on a desk stuck showing its boot logo during a restart loop

Quick Answer

A phone that keeps restarting usually has a bad app or update or a battery that can no longer hold voltage under load. Boot into Safe Mode first: if the restarts stop there, a downloaded app is the culprit. If they continue in Safe Mode — especially with percentages that jump around — suspect the battery or hardware. And if the battery is swollen, go straight to a repair shop.

Fix 1: Boot Into Safe Mode and Observe

Safe Mode boots the phone with only preinstalled system apps — every downloaded app is frozen out. That makes it the perfect first test: it divides the problem in half. It is not a fix. It is an X-ray.

Thumb pressing the phone's side buttons to enter Safe Mode

  1. Press and hold Power for the power menu, then touch and hold Power off until the Safe Mode prompt appears, and tap OK. (No prompt? Restart and hold Volume Down from the brand logo until the home screen loads.)
  2. Use the phone normally for a few hours — calls, camera, usual routine.
  3. Read the result. Restarts stopped? A downloaded app is the trigger — go to Fix 2, then Fix 4. Still restarting in Safe Mode? The cause is system-level or hardware; Fixes 5 to 9 hold the answer.

Fix 2: Leave Safe Mode Properly

Exiting should be a plain restart: hold Power, tap Restart, and your apps come back. If it keeps booting back into Safe Mode, a stuck volume button or case is usually holding the entry shortcut down. Full walkthrough: Stuck in Safe Mode on Android? 6 Fixes (2026).

Do not just live in Safe Mode because the restarts stopped there — your apps are disabled, nothing is fixed, and you have a clue, not a cure. Exit, then hunt the app (Fix 4).

Fix 3: Free Up Storage and Clear Big Caches

A phone with nearly full storage cannot write temporary files, finish updates, or log errors properly — and system services crashing under that pressure can end in restarts. It is the most underrated cause here, and the cheapest to fix.

Android Storage settings showing the storage bar almost full

  1. Open Settings → Storage. Down to the last gigabyte or two? That alone is a problem.
  2. Delete the easy weight: the Downloads folder, old videos, apps you never open.
  3. Clear the biggest caches: Settings → Apps → See all apps, open the largest few, tap Clear cache. (Cache only — Clear data wipes stored content and signs you out.)
  4. Free up at least a few gigabytes, restart normally, and observe for a day.

Fix 4: Update Apps — or Roll Back a Bad Update

Ask the question that cracks many of these cases: when exactly did this start? If the loop began the day an app updated, or the night a system update installed, you have a suspect, not a mystery.

  1. Update the rest: Play Store → profile icon → Manage apps & device → Update all, and check Settings → System → Software update for a pending patch — buggy releases are often quickly followed by fixes.
  2. If one app's update started it, uninstall that app for a day. For preinstalled apps, roll back instead: Settings → Apps → (the app) → three-dot menu → Uninstall updates.
  3. If Safe Mode pointed at apps, remove the newest apps first, a few at a time, restarting between batches — battery “boosters,” cleaners, and launchers are repeat offenders.

Fix 5: The Battery Reality Check

The hardware cause that disguises itself as software: a worn battery can show a healthy percentage yet fail to deliver the burst of power the processor demands — voltage sags, the phone cuts out, and it reboots. The fingerprints:

  1. The percentage jumps around — it restarts at 62% and comes back at 38%.
  2. It dies under load — camera, torch, gaming — even with plenty of charge showing.
  3. It only stays on reliably while plugged in.

If that pattern matches, no setting will cure it — the battery needs replacing (Fix 9). One safety line: if the battery is swollen — back panel lifting, screen pushing up at the edges, phone rocking on a flat table — stop using it, stop charging it, and take it to a repair shop. A swollen battery is damaged goods, not a DIY project.

Fix 6: Rule Out Overheating

Phones defend themselves from heat by throttling, then force-restarting. A phone that restarts hot is protecting itself — find what is making it hot.

  1. Run it without its case for a day — thick cases trap heat.
  2. Do not game, navigate, or shoot long video while fast-charging during the test — charging plus heavy use stacks heat.
  3. Check Settings → Battery → Battery usage for one app burning power in the background — a runaway app can pin the processor.
  4. Note where the heat sits: hot near the top, by the cameras, means the processor is working (software); the whole back uniformly hot points to the battery (Fix 5).

Fix 7: Check the Power Button and Case

The simplest mechanical cause: something is pressing the power button. A damaged, sticking button — or a tight third-party case leaning on it — triggers restarts that look exactly like a software loop, and the phone obeys because, as far as it knows, you asked.

  1. Take the case off for a day (it may also be holding a volume button down — Fix 2).
  2. Feel the button: it should click cleanly and spring back. Mushy or sunken — suspect it.
  3. Check for a scheduled power on/off setting — some brands (Xiaomi, Realme, Oppo) offer scheduled restarts under Battery or Additional settings; an accidental schedule explains restarts at regular times.
  4. A stuck button is a small, cheap repair-shop job — but hardware; no app fixes it.

Fix 8: Factory Reset — Back Up First

Only now — Safe Mode, storage, updates, battery, heat, buttons all checked — does the reset earn its place. It erases everything: apps, accounts, settings, files in internal storage. Back up first: photos/videos to Google Photos or a computer, chats and contacts to your Google account.

  1. If the phone stays up long enough: Settings → System → Reset options → Erase all data (factory reset), confirm, let it finish.
  2. If the loop blocks that path: power off, hold Power + Volume Up until a recovery menu appears, highlight Wipe data / factory reset with the volume keys, confirm with Power, then reboot.
  3. Set up clean — sign in, but do not restore your whole app collection yet; use it bare for a day.
  4. Restarts on a clean, empty phone? Verdict: it was never software. Go to Fix 9.

Fix 9: When It's the Board or the Battery

The honest stopping point. Take the phone in when restarts continued in Safe Mode and survived a clean factory reset; when the percentage jumps wildly or the phone dies at healthy-looking charge; when it runs hot doing nothing; or when the battery is swollen — that last one is not optional. A technician can test battery health and the board directly.

The money judgement: a battery replacement is usually the one repair worth paying for — the most common hardware cause here, and the cheapest. Board-level repair on an older budget phone often costs more than the phone is worth. If it still boots intermittently, finish your backup in those uptime windows, before it stops booting at all.

Watch: Android Restart Loop Fixed Step by Step

Prefer to watch it done? This video walks through stopping an Android restart loop step by step:

Video by Quick Tutorials — full credit to the creator.

Reading Your Phone's Restart Pattern

When it restarts is the best clue to why:

  • Only under load — games, camera, torch: battery voltage sag (Fix 5).
  • When opening one app: that app or its update (Fix 4).
  • While charging, and hot: heat plus a struggling battery or poor charger (Fix 6).
  • Randomly, even sitting idle — in Safe Mode, and after a reset: hardware. Case closed.

Restart Questions, Answered Plainly

Will a factory reset definitely stop the restarts?

No — which is why it sits at Fix 8, not Fix 1. A reset wipes software causes, so if an app, an update, or corrupted system data was responsible, the restarts end. A worn battery or faulty board sails straight through it. Run the earlier tests first, and the reset becomes a verdict instead of a gamble.

Is it safe to keep using a phone with a swollen battery?

No. A swollen battery is damaged goods. Stop charging it, do not press the bulge or carry it in a tight pocket, and take it to a repair shop. Every other fix in this guide can wait; that one cannot.

By Sameer Zehri | App Fix Guru Editor | Last updated: October 2026