First separate normal from abnormal. Getting warm during fast charging, heavy gaming, video recording or long GPS use is expected: the phone gets warm or hot near the top and returns to normal within minutes. What is worrying is heating up sitting in your pocket with the screen off, always heating in the same spot, or heat that comes with the battery draining fast. In those cases go to Solution 2 and find which app is consuming, because most of the time that is it. Solution 3 covers charging, the second most common cause. And read Solution 8 before anything else if the back is swollen, if there is an odd smell, or if the phone gets too hot to hold: that is a safety matter, not a settings one.
What causes this problem
- A stuck app using the processor in the background without you noticing, often after an update.
- Fast charging, a poor quality charger or cable, or heavy use of the phone while it charges.
- Intense, prolonged use: 3D games, video recording, GPS navigation and live streaming.
- A hot environment and a surface that traps heat, such as direct sun, a car dashboard, a bed or a sofa.
- Weak mobile signal, which makes the radio run at full power hunting for the network all the time.
- An aged or damaged battery, which heats up under little load and loses charge quickly.
- Note when the heat shows up: charging, gaming, with the screen off, or all the time? That answer decides which fix to try first and saves you wasting time on the rest.
- Touch the back and find the hottest spot. Heat near the camera is usually the processor, meaning some app; heat in the middle or near the charging port points to the battery and charging.
- Take the case off, especially a thick silicone one or a wallet type, and repeat the test. Cases trap a lot of heat and change the diagnosis.
- Note whether the problem started after installing or updating an app, or after a system update.
- Back up your photos and chats before moving on to the more drastic fixes at the end of this guide.
Solutions, in the order to try them
1Tell normal heat from abnormal heat and cool down safely
Every phone gets warm, and that is almost never a fault. The processor and the battery generate heat, and the phone's body is what sheds it, which is why it feels warm on the outside when it works hard. What matters is the pattern: heat that appears under load and fades a few minutes later is normal. Constant heat with no load at all is not. Before investigating, cool it down the right way, because the wrong way damages the phone.
- Take the case off, close open apps and leave the phone still on a hard surface such as a table, never on a bed, a sofa or a pillow.
- Get it out of the sun and off the car dashboard. Direct sun alone is enough to shut a phone down from overheating.
- If it is charging, unplug it while it cools.
- Never put it in the fridge, the freezer or under cold water. A sudden temperature change creates condensation inside and the damage is worse than the heat.
- If the screen shows a temperature warning, do not push it: let the phone rest until the message clears on its own.
2Find which app is consuming
This is the most common cause of heat with no obvious reason. A stuck app keeps running in the background and holds the processor at high speed even with the screen off. Android records consumption per app, and that list hands you the culprit in seconds: look for the name you did not expect to see there.
- Open Settings and go into the battery section.
- Find battery usage by app and sort by highest consumption.
- Ignore the screen and the system, which always appear at the top. Look for apps you barely use that are still high on the list.
- Tap the suspicious app and force stop it. See whether the phone cools down over the next few minutes.
- If it cools, go into that app's settings, clear its cache and then update it from the app store.
- If the heat comes back, uninstall it and watch for a day. If the app is essential, restrict its background usage in its battery settings.
3Fix the way you charge
Charging is when a phone gets hottest, and it is when most people do something wrong. The battery generates heat by nature while charging, and using the phone at the same time adds the processor's heat to the battery's. A poor cable and a generic charger make it worse, because they deliver unstable current and the electronics work harder to compensate.
- Use the charger and cable that came with the phone, or a known brand with the wattage the manufacturer specifies.
- Do not game, watch video or take video calls while charging. If you need to use it, unplug it.
- Charge on a hard, open surface. Beds, sofas and pillows trap heat and are also a risk if something is faulty.
- Take the case off while charging if the phone tends to get quite warm.
- If your phone offers optimised charging or a charge limit, turn it on: charging more slowly and stopping before one hundred percent produces less heat and preserves the battery.
- Look into the charging port with a flashlight. Dust, lint and a bent pin cause poor contact and heat the connector.
4Update the system and the apps
A good share of sudden overheating cases come from a software fault, not hardware. An app with a bug that keeps repeating the same task in the background is common, and the fix usually arrives in an update. The system also receives power and temperature management adjustments.
- Open the app store, go to the management area and update everything pending.
- In Settings, find the system update section and install whatever is there.
- If the problem started right after one specific app update, uninstall that app's updates where the option exists, or wait for the next version.
- Restart the phone after updating. A restart on its own clears stuck processes and fixes cases where the heat appeared out of nowhere.
5Cut back what keeps working in the background
GPS, syncing, Bluetooth and automatic app updates all keep the phone busy even when idle. None of them heats the phone on its own, but together and running all day they make a noticeable difference, especially on more basic handsets.
- In Settings, under location, see which apps are allowed to use GPS all the time and switch them to allow only while in use.
- Turn Bluetooth off when you are not using headphones or a watch.
- In the battery settings, find the background usage restriction and apply it to apps you rarely open.
- In the app store, set automatic updates to Wi-Fi only, so downloads do not pile on top of mobile data.
- If the phone has a battery saver mode, turn it on for a day and see whether the heat drops. That confirms the cause is software, not hardware.
6Check the mobile signal
This cause is little known and explains many cases of a hot phone in a pocket, unused. When the signal is weak, the phone's radio raises its power and keeps hunting for the network non-stop. That drains the battery and produces real heat, and it happens in basements, lifts, buildings with metal structures, rural areas and while travelling.
- Look at the signal bars in the place where the phone tends to get hot. One bar or none explains the problem.
- Test Airplane Mode for ten minutes in one of those places. If the phone cools down, the cause is the signal.
- Where there is Wi-Fi, turn on Wi-Fi calling if your phone and carrier offer it, to relieve the radio.
- If you force the phone to always use the newest network type, try leaving it on automatic for a while and compare.
7Test in safe mode and clear what is left
If the heat persists and the battery list did not reveal the guilty app, safe mode settles the question: it starts Android with none of the apps you installed. If the phone stays cool that way, the cause is an app, no argument, and all that remains is finding which one.
- Hold the power button, then press and hold the power off option until it offers to restart in safe mode, and confirm. On some phones the path differs slightly.
- Use the phone for an hour or two in safe mode, with normal usage, and watch the temperature.
- Did it stay cool? Restart normally and uninstall the apps installed or updated around the date the problem started, one at a time.
- Still hot even in safe mode? Suspicion moves to the system or the hardware, and Solution 8 plus a technical inspection are the way forward.
- While you are there, free up storage: a phone with storage nearly full works harder and runs hotter.
8Recognise the signs of a failing battery and stop using it
This is where the subject stops being configuration and becomes safety. A damaged lithium battery can swell, leak and, in rare cases, catch fire. The signs are visible and should not be ignored or put off. Do not puncture it, do not squeeze it and do not try to remove the battery yourself: piercing a swollen battery is exactly what causes the accident.
- Look at the phone from the side, at table height. A bulging back, a screen lifting at the edge or a phone that rocks on the table all point to a swollen battery.
- A sweet or burnt smell, hissing, leaking or deformation mean stop using it immediately.
- A phone too hot to hold, shutting down on its own from temperature, or with the screen going dark while charging, is also a reason to stop.
- In those cases, unplug it, switch it off, keep it away from cloth, paper and bedding, on a hard, open surface, and take it to a repair shop.
- A battery that lasts far less than it used to and heats up under little load is usually near the end of its life, even without swelling. Replacing it fixes both the heat and the runtime at once.
- Prefer an authorised or trusted repair shop. A generic battery of dubious origin is precisely the kind that causes temperature problems.
9Last resort: factory reset
When the phone heats up even in safe mode, with good signal and not charging, and the battery looks healthy, the remaining possibility is a corrupted system. A factory reset erases everything on the phone and returns the system to its original state. Back up first, without rushing, because there is no undo.
- Save photos, videos, contacts and your messaging app chats. Confirm the backup really finished before going on.
- Note your passwords and check that you can sign back into the account used on the phone. Without it, many phones will not grant access after the reset.
- In Settings, find the system section and the factory data reset option, and confirm.
- When setting it up again, install your apps gradually and use the phone for a few days before restoring everything. That way you notice if one specific app is the cause.
- If the heat returns on a freshly reset, practically empty phone, the problem is hardware and a repair shop is the way forward.
Applies to
| System | Status |
|---|---|
| Android 12 through Android 15 | Confirmed |
| Android 10 and Android 11 | Confirmed |
| Phones with a manufacturer skin | Each brand arranges Settings differently; use the search inside Settings to find the section |
| Android tablets | Everything applies except the mobile signal part on Wi-Fi only devices |
Menu names can change slightly between versions. If a step above does not match what you see on screen, the official support page from the manufacturer has the most current wording for your version.
Frequently asked questions
Last checked: Oct 11, 2026 · We review this guide whenever the manufacturer changes the process.