Why Is My Phone Overheating and How to Fix It Fast
Updated for 2026 to reflect current UK emergency call-out pricing and insurance changes.
A phone that feels hot to the touch isn’t just uncomfortable to hold—excessive heat degrades the internal battery chemistry permanently and can even cause hardware failure. If you’ve received a “Temperature Warning” on your screen, immediate action is required.
Time Needed: 5 Minutes
- Shaded, cool environment
- Disconnect all charging cables
NEVER Put Your Phone in the Fridge/Freezer!
Rapid cooling causes condensation (water droplets) to form inside the phone. This will immediately short-circuit the motherboard and destroy the device. Always cool a phone gradually at room temperature.
Quick Diagnosis: Why is it Hot?
Smartphones pack immense processing power into a tiny space with no cooling fans. Overheating is typically caused by:
- Environment: Leaving the phone in direct sunlight or a hot car.
- Heavy Processing: Playing 3D games, recording 4K video, or using GPS navigation for extended periods.
- Charging: Fast charging generates natural heat. If you use the phone while fast charging, the heat doubles. See our guide on phone charging issues.
- Software Bugs: A rogue app constantly searching for a Wi-Fi or Bluetooth connection in the background.
Immediate Steps to Cool It Down
Step 1: Stop and Unplug
If the phone is plugged into a charger, unplug it immediately. Stop using the device. If you are playing a game or using GPS, close the app.
Step 2: Remove the Case
Thick rubber, leather, or plastic cases act as insulation, trapping the heat generated by the battery against the glass back of the phone. Stripping off the case allows the heat to dissipate rapidly into the surrounding air.
Step 3: Enable Airplane Mode
If you have a weak signal, the phone’s internal antenna will max out its power trying to find a tower, generating massive amounts of heat. Turning on Airplane Mode instantly cuts power to the GPS, Bluetooth, Wi-Fi, and cellular radios, giving the processor a rest.
Step 4: Lower Screen Brightness
The screen is the biggest power draw on any phone. Turn off Auto-Brightness and manually slide the brightness slider down to the lowest visible setting.
Step 5: Fan It or Move to Shade
Place the phone on a hard, cool surface (like a stone countertop or tile floor) in a shaded room. Pointing a gentle desk fan at the phone is the safest and fastest way to bring the temperature down.
Troubleshooting Chronic Overheating
If your phone constantly overheats even when you aren’t doing anything demanding, try these software fixes:
- Check Battery Usage: Go to Settings > Battery and look for apps draining unreasonable amounts of power. Delete them.
- Update OS: Ensure your iOS or Android version is updated. Developers frequently patch thermal management bugs. Check our Android optimization guide.
- Factory Reset: If all else fails, wiping the phone clears out deep-seated software glitches.
When to Call a Professional
If your phone overheats while completely turned off, or if the back glass panel is starting to bulge and push outward, stop using the phone immediately. This indicates a failing, swollen lithium-ion battery. A swollen battery is a severe fire hazard and can explode. Do not charge it. Take it to a professional electronics repair shop for immediate battery replacement.
Frequently Asked Questions
Why does my phone get hot while charging?
This is normal. Fast chargers pump a massive amount of voltage into the battery quickly, which naturally produces heat. It should get warm, but not painfully hot to touch.
Will the phone permanently shut down if it gets too hot?
Most modern smartphones have thermal trip-wires. If the internal temperature reaches a dangerous level, the phone will display a warning and automatically shut down to prevent the battery from catching fire.