A phone overheats when its processor, battery, or charging system is working harder than it can cool. The quick fixes: close heavy apps and games, take it out of direct sunlight, remove the case while it cools, stop charging and using it at the same time, lower your screen brightness, and turn off features you aren’t using like GPS or hotspot. If it still overheats constantly, a failing battery or a misbehaving background app is usually to blame, and both are fixable.
Every phone gets warm sometimes — during gaming, video calls, fast charging, or a hot day. That is normal. What isn’t normal is a phone that becomes uncomfortably hot to hold, throttles to a crawl, drains battery fast, or flashes a temperature warning. Persistent overheating shortens your battery’s life and can even damage components, so it is worth fixing properly. This guide covers the immediate cool-down steps and the deeper causes for both Android and iPhone.
Cool it down right now
If your phone is hot this second, act in order. First, stop whatever is stressing it: quit games, camera, or video, and if you are charging, unplug it. Second, remove it from heat — get it out of direct sun, off the car dashboard, and out of your pocket where body heat traps warmth. Third, take the case off; many cases act like a blanket and trap heat against the back where the battery sits.
Then reduce the load: drop screen brightness, turn on airplane mode for a minute to halt all radios, and set the phone on a cool, hard surface like a table rather than a soft couch or bed that insulates it. Avoid the temptation to stick it in the fridge or freezer — the sudden temperature swing causes condensation inside the phone, which does far more harm than the heat. Let it return to room temperature naturally over a few minutes.
Putting an overheating phone in the freezer or on ice seems logical but causes internal condensation and can permanently damage the electronics. Cool it gently at room temperature instead.
Why phones overheat
Heat comes from a handful of sources. Intensive tasks — gaming, 4K video recording, navigation, or video calls — push the processor hard and generate warmth. Charging, especially fast charging, heats the battery, and using the phone heavily while it charges stacks both heat sources at once. A weak or old battery generates more heat as it degrades. And environmental heat, like sunlight or a hot car, removes the phone’s ability to shed warmth.
Software causes are just as common and often overlooked. A buggy or poorly optimised app can peg the processor in the background, quietly cooking your phone even when the screen is off. Too many apps refreshing in the background, a stuck software process after a missed update, or malware on a sideloaded app can all keep the hardware busy and hot when it should be idle.
Fixing constant overheating on Android
If the heat keeps returning, hunt down the cause systematically. Check your battery settings for which apps use the most power — a single app dominating the list while you aren’t using it is your prime suspect. Update or uninstall it. Make sure your system software is current, since updates frequently patch overheating bugs. And restart the phone; a simple reboot clears stuck processes that a quick lock-and-unlock never touches.
- Open Settings, then Battery, and review which apps are using the most power.
- Force-stop or uninstall any app using heavy power in the background that you aren’t actively using.
- Update all apps and your Android system software to patch known overheating bugs.
- Restart the phone to clear stuck processes, and test whether it runs cooler.
Fixing constant overheating on iPhone
On iPhone, the steps mirror Android. Check Settings, Battery for apps with unusual background activity, and offload or delete a suspicious one. Keep iOS updated. If overheating started right after an update or restore, give it a day — iPhones often run warm for several hours while they re-index photos and data in the background, and this settles on its own. A forced restart clears anything stuck.
If your iPhone overheats during normal, light use and the battery drains unusually fast, check Battery Health in settings. A battery that has degraded below about 80 percent capacity runs hotter and less efficiently, and replacing it — often inexpensively — solves the heat and the poor battery life together.
If overheating comes with fast battery drain, a swollen back, or the phone getting hot even when idle, the battery itself is likely the culprit. A worn battery is the single most common cause of chronic overheating in older phones.
Charging without the heat
Charging is a major heat source, so a few habits help a lot. Don’t game or stream while fast-charging — that combination produces the most heat of all. Charge on a hard surface, not under a pillow or on a bed where heat can’t escape. Use a good-quality charger and cable rated for your phone; cheap, uncertified chargers run hotter and less safely. And if your phone supports it, overnight or optimised charging modes reduce heat by slowing the final top-up.
If your phone always gets hot while charging, try removing the case during charges. Thick or poorly ventilated cases trap the heat the battery produces, and taking it off can noticeably lower the temperature.
When to worry
Occasional warmth is fine. Be concerned if the phone gets hot doing almost nothing, shuts down or throttles from heat regularly, shows a swollen or bulging back or screen, or smells faintly of burning. A swollen battery is a safety hazard — stop using and charging the phone and get the battery replaced by a professional promptly. For everything else, the steps above resolve the vast majority of overheating without any repair.
FAQ
Is it bad if my phone gets warm while charging?
Mild warmth is normal, especially with fast charging. Uncomfortable heat, or heat plus very slow charging, points to a cheap charger, a trapped-heat case, or an ageing battery.
Can overheating damage my phone permanently?
Repeated high heat degrades the battery faster and can stress other components over time. The occasional warm session is harmless, but chronic overheating is worth fixing to protect the phone’s lifespan.
Why does my phone get hot when I’m not using it?
Almost always a background app or a stuck software process. Check battery usage for a culprit, update or remove it, and restart the phone. If it persists, suspect the battery.
Does a hot phone charge slower?
Yes. Phones deliberately slow or pause charging when they detect high temperatures to protect the battery, so cooling the phone down actually speeds charging back up.
Habits that prevent overheating long-term
Once you have cooled a phone down, a few ongoing habits keep it from happening again. Keep your apps and operating system updated, because a surprising share of overheating episodes trace back to a bug that a later update quietly fixed. Periodically review which apps run in the background and restrict or uninstall the ones you don’t need constantly refreshing — social, shopping, and delivery apps are common offenders that wake the processor far more often than you would expect.
Be mindful of environment, too. Leaving a phone on a car dashboard, a sunny windowsill, or next to a laptop’s hot exhaust vent bakes it from the outside and removes its ability to shed its own heat. Give it somewhere cool and ventilated to sit, especially while charging or navigating. And restart your phone every few days rather than leaving it running for weeks on end; a periodic reboot clears the accumulated background processes that gradually push the processor to work harder and run warmer than it needs to.
Finally, respect your battery’s age. Batteries are consumables that degrade with every charge cycle, and a phone two or three years old will naturally run warmer than it did when new. If yours has reached that stage and overheating has crept in alongside shorter battery life, a battery replacement is usually the single most effective fix — cheaper than a new phone and enough to make an older device feel healthy again.
The Bottom Line
An overheating phone is usually easy to fix: cool it gently at room temperature, remove the case, stop heavy use while charging, and hunt down any background app that is working the processor overtime. Keep your software updated and use a decent charger, and most heat problems disappear. If overheating is constant and paired with fast battery drain or a swollen back, the battery is the likely cause — and replacing it restores both a cool phone and all-day battery life.