Post actualizado el día octubre 26, 2026 by DeiviSanzPlay
Your phone restarts itself out of nowhere, and you’ve already started browsing new models. Stop right there. That reboot loop is almost never a death sentence, and in most cases you can fix a phone that keeps restarting itself without spending a single euro. The trick is knowing which of the five usual suspects is behind it, in the right order, before you nuke your data with a factory reset.
I’ve seen people wipe a perfectly fine phone over a dirty charging port. That’s like demolishing the house because a bulb is flickering. So let’s go step by step, from the cheapest and dumbest cause to the scary one.
1. Is it hot? Then stop using it, that’s your answer
If the phone turns off after 10 minutes of gaming, filming or charging, you’ve got an overheating problem. The processor is basically begging for mercy, and the automatic shutdown is a defense mechanism to avoid frying itself.
Remove the case, get it off the charger, put it on a cold surface (not the fridge, please) and let it breathe. If the reboots stop once it’s cool, you don’t have a software bug, you have a heat problem. Heavy background apps, a thick case and direct sun do the rest.
This is the most common cause of a phone that keeps restarting itself during use, and also the easiest to fix for free: close apps you don’t use, disable auto-brightness at max, and stop charging it under a pillow.
2. Not hot? Boot into Safe Mode and hunt the guilty app
If the phone is cold and still reboots, the next suspect is a rogue app. Android has a built-in Safe Mode that loads only the system, exactly like Windows. If the phone behaves perfectly in Safe Mode, bingo: an app is crashing the system.
Uninstall whatever you installed in the last days, especially «cleaners», battery savers, modded APKs and anything from outside the Play Store. Then reboot normally and see. Nine out of ten random restart loops come from a badly coded app or a corrupted update.
On iPhone there’s no Safe Mode, but you can do the equivalent: check Settings > Battery for an app draining abnormally, and update or delete it.
3. Old phone shutting down suddenly? Blame the battery
A worn battery is the silent killer of a phone that keeps restarting itself. When its internal resistance rises, it can’t deliver the peak current the processor demands, so voltage drops and the phone dies instantly, sometimes showing 30% or 40% left.
Classic signs: it turns off when you open the camera, when it gets cold outside, or when you launch a heavy game. If your phone is two or three years old, this is very likely your issue.
You can check battery health on iPhone in Settings > Battery > Battery Health. On Android, apps like AccuBattery give you a decent estimate. If health is under 80%, a battery replacement is cheap and solves it permanently.
4. Clean the charging port and the power button
Sounds silly, I know. But lint, dust and pocket crap inside the USB-C or Lightning port cause voltage fluctuations that destabilize the system. Same with a stuck power button: the phone thinks you’re holding it and reboots.
Turn it off, grab a wooden toothpick (never metal) and gently scrape the port. You’ll be amazed at the gray fluff that comes out. For the power button, a bit of isopropyl alcohol on a cotton swab and press it several times to release it.
This step alone fixes a surprising number of cases of a phone that keeps restarting itself, and it costs zero euros.
5. Ditch the cheap charger and the thick case
Always use the original charger or a certified one. A no-name charger delivers unstable voltage, and the phone reacts by rebooting to protect itself. Same with a cable that’s half broken: it causes micro-cuts that the system reads as a power failure.
And remove the case while you test. A case that presses the power button or traps heat can trigger the loop. Test for a full day without it and with the original charger. If the reboots stop, you already know what to change.
What if none of this works?
Then yes, we’re talking about something deeper. Two options: a corrupted operating system that needs an urgent update or a clean flash, or a hardware failure on the motherboard, usually after a fall or liquid damage.
Before panicking, do a full backup and check for pending system updates. A botched OTA update is a classic cause of a phone that keeps restarting itself in a loop. If the phone won’t even boot, try recovery mode and wipe the cache partition, not the data.
Only after all of this should you consider a factory reset. And if even that fails, then it’s time for a technician. But by then you’ll have ruled out everything free, and you’ll know exactly what to tell them.
- Hot + reboots: overheating, cool it down.
- Cold + reboots: Safe Mode and uninstall apps.
- Old + sudden shutdowns: battery replacement.
- Any phone: clean port and power button.
- Always: original charger and no case while testing.
Ninety percent of reboot loops die with these five tricks. The other ten percent are hardware, and no app will save you there. But at least you won’t have thrown away a phone that only needed a toothpick and a new battery.
