Android Boot Loop? Why It Keeps Restarting and How to Fix It

An Android boot loop is when your phone starts up, shows the logo, then restarts, over and over, without ever reaching the home screen. A close cousin is a phone that’s stuck on the boot screen, frozen on the logo indefinitely. Either way, the phone is telling you something is wrong with its software, its storage or its hardware. Here’s how to figure out which, the fixes to try in a safe order, and how to avoid losing your data in the process.

Why does my Android phone keep restarting?

When an Android phone keeps restarting, the cause usually falls into one of these groups:

• A failed or interrupted update. An update that lost power, ran out of space or didn’t install correctly can leave the system unable to finish starting.
• A bad app. An app that crashes the system, especially one that starts automatically, can trigger restarts every time the phone boots.
• Storage that’s completely full. Android needs free space to start up and run. A phone with almost no space left can freeze, crash and restart.
• Corrupted system files. Sometimes the software gets damaged with no obvious trigger.
• Battery problems. A worn battery may not deliver enough power as the phone starts, causing it to shut off and try again. This often gets worse in the cold or when the battery is low.
• Hardware faults. Damage to the logic board or the storage chip (eMMC or UFS) after a drop, liquid exposure or plain wear can cause restarts that no software fix will cure.

Samsung keeps restarting: the same causes, a few extra tools

If your Samsung keeps restarting or is in a Samsung boot loop, the causes above all apply. Samsung phones also tend to keep the wipe cache partition option in their recovery menu, and Samsung’s Smart Switch computer app includes software recovery tools. Both are covered below.

Step 1: Force restart and charge

Start simple. A force restart erases nothing.

• Samsung: hold Side key + Volume Down for 10 seconds or more.
• Pixel: hold Power for about 30 seconds (some models use Power + a volume key; check Google’s support pages).
• Other brands: most respond to Power + Volume Down for 10 to 20 seconds.

Then leave the phone on a known-good charger for 30 minutes before trying again. A low battery can cause a loop all by itself. While you’re at it, take out the microSD card if there is one; a failing card occasionally causes problems at startup.

Step 2: Boot into safe mode and remove recent apps

Safe mode loads Android without the apps you installed. If the phone is stable in safe mode, an app is the likely culprit.

1. On many phones, hold Volume Down as the phone starts up and keep holding until it finishes booting. On some, you can long-press Power off in the on-screen power menu instead.
2. Look for Safe mode in the corner of the screen.
3. Uninstall the apps you installed or updated just before the restarts began.
4. Restart normally.

Menus and button combinations vary by manufacturer and Android version.

Step 3: Free up storage

If you can reach Settings, even briefly or in safe mode, check storage (usually Settings → Storage, or Settings → Battery and device care → Storage on Samsung). If it’s nearly full, back up and delete large videos or downloads, or remove apps you don’t use.

Step 4: Wipe the cache partition (where available)

The cache partition holds temporary system files. Clearing it does not erase your data, and it can fix loops that start after an update.

1. Turn the phone off. If it won’t stay off, start this step right as it restarts.
2. On many Samsung phones, hold Side key + Volume Up to open the recovery menu. Some recent Galaxy models need a USB cable connected to a computer first.
3. Use the volume keys to select Wipe cache partition, press the Side key to confirm, then choose Reboot system now.

Do not select “Wipe data/factory reset” unless you’re ready to lose everything on the phone. Many newer phones, including recent Pixels, no longer include a wipe cache option.

Step 5: Repair the software with the manufacturer’s tools

If the loop survives everything above, the system software may need to be reinstalled.

• Samsung: the Smart Switch app for Windows and Mac has offered an emergency software recovery option for phones that won’t start. Some of its options reinstall the software and erase the phone, so read every prompt before you continue.
• Pixel: Google offers a web-based Pixel Update and Software Repair tool that can reinstall the software. It has options that keep your data and options that erase it, so read the prompts carefully.
• Other brands: check the support site for your phone, or ask the manufacturer or carrier.

Step 6: Factory reset, only as a last resort

A factory reset from the recovery menu often ends a software boot loop, but it permanently erases the phone. Before you do it:

• Check photos.google.com and the Backups section in Google Drive to see what’s already safe.
• On Samsung, check Samsung Cloud and any Smart Switch backups on your computer.
• If the phone stays on long enough, back up what you can, even just copying photos to a computer over USB.
• Make sure you know the Google account password, since Factory Reset Protection will ask for it afterward.

If the data matters and it isn’t backed up, stop here. Once the phone is reset, nobody can get that data back.

When a boot loop is a hardware problem

If the phone loops even after a software repair or reset, or the loop started right after a drop or liquid exposure, suspect hardware:

• a battery that can’t hold up under load,
• a damaged logic board, or
• a failing eMMC or UFS storage chip.

These need board-level work. Because Android phones encrypt their storage with keys tied to the phone’s own hardware, the data can only be recovered by getting the original board running well enough to boot, then unlocking it with your PIN, pattern or password. Read more about a phone boot loop from the hardware side. If the phone won’t power on at all, see Android won’t turn on, and if it got wet, read water-damaged device recovery first.

The bottom line

When an Android phone keeps restarting, work from the safe fixes to the risky ones: force restart and charge, safe mode to remove a bad app, free up storage, wipe the cache partition where available, then a software repair with your manufacturer’s tool. Factory reset ends most software boot loops, but only reset once your data is backed up. If the loop is caused by hardware, more software attempts won’t help. After you’re back up, the 3-2-1 backup rule keeps the next failure from costing you anything.

If your phone is stuck in a boot loop and holds photos or messages you can’t replace, our Android data recovery service repairs the original board enough to boot it and extract your data. You’ll need your PIN or pattern. It’s one flat $1,200 for a single device, with a free prepaid shipping label, and you pay only if the recovery succeeds.