Many Samsung Galaxy S21, S21+, or S21 Ultra users are complaining that they are facing overheating issues on their phones. Some of them are getting messages relating to overheating problems.
If you are also Samsung Galaxy S21/S21+/S21 Ultra user and going through the same problem then don’t panic. Here, you will learn proven ways to fix Samsung Galaxy S21/S21+/S21 Ultra Overheating issue.
Before you learn the solutions to stop your S21/S21+/S21 Ultra from overheating, you should first check out a real user practical scenario so that you will know that many Galaxy S21 series users are going through this overheating problem.
Practical Scenario: A User Want To Know Is S21 Ultra Overheating Issue Is Normal For Everyone
I have the US S21 Ultra, and it’s pretty hot to the touch after opening just a few apps and browsing. After only 90 mins of screen time, I’m already down to 67%. I looked at the battery log and the majority of the drain is from phone calls. But even when I’m not on calls, it’s regularly at 41 degrees Celsius or more. Is this normal for everyone?
Also, I have VZW prepaid and moved my Sim from a 4g note 10+ to this phone. I don’t seem to get 5g, nor is there a selection on the settings to choose 5g. Do I need a different Sim?
Source: Android Central Forums
Now, without wasting time we will go to the solutions to fix S21/S21+/S21 Ultra Overheating problem but before learning the main solutions you should apply some basic settings.
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Basic Settings To Apply To Avoid Overheating Issue On Samsung Galaxy S21/S21+/S21 Ultra
- Try to avoid your phone from hot places.
- Don’t use your device while charging.
- Try to use mobile data while browsing.
- Turn off fast charging by going to Settings > Device Care > Battery > Charging > toggle off Fast Charging, Super Fast Charging, and Fast Wireless Charging.
- Check if there is any fault with your charger.
- Avoid overcharging your phone.
- Keep the brightness of your phone down.
- Take beak while gaming.
- Keep all the apps updated on your phone.
- Install anti-virus software to protect your device from malware and viruses.
- You should stop playing heavy games on your phone.
- You should not use your phone while the signal is poor.
- You can install some third-party apps like Cooler Master, Device Cooler Master, etc. to keep your phone cool.
- Try to avoid shooting high-quality videos recordings.
- You should also avoid watching videos on your phone for a long period of time.
Solution 1: Restrict Background Data
You can prevent the applications from using the background data. This will help to fix overheating issue.
Here, follow the steps to do so.
Step 1: Open Settings app on your phone then tap on Connections.
Step 2: After that, choose Data usage.
Step 3: Choose the apps that use background data.
Step 4: Then disable background data usage by toggling off the Restrict background data.
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Solution 2: Disable 5G While Using Wi-Fi
When you are using Wi-Fi connecting but your 5G cellular data is enabled then this will cause your Galaxy phone to overheat. So, if you are also doing the same thing then turn off mobile data and wait for a few minutes, and then check the issue is fixed or not.
If it is fixed then keep your cellular data turned off while using the wireless network.
You should also disable all features on your phone that you are not regularly using such as GPS, Bluetooth, etc.
Solution 3: Update Your Galaxy S21/S21+/S21 Ultra
You should also check that if there is any new update for your OS is available. If it is, then install the latest version this can also fix Galaxy S21 overheating problems.
Here, follow the steps to update your Galaxy S21, S21+, or S21 Ultra.
Step 1: Open Settings on your phone.
Step 2: Then tap on About device.
Step 3: After that, hit on Software update and if there is an update available then you will find Update Now button. Just tap on it to update.
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Solution 4: Keep Your Apps To Sleep
All the apps running in the background can also overheat your device. You can keep those apps to sleep mode so that they can’t use your phone’s battery and produce heat.
Here, follow the steps to put the apps to sleep mode to fix overheating issue on Samsung Galaxy S21 Ultra.
Step 1: Open Setting > Battery > device care.
Step 2: Choose Battery and then go to Background usage limits.
Step 3: Turn on Put unused apps to sleep.
Step 4: Now, set sleep delay time and add them to the list of Sleeping apps and Deep sleeping apps.
Solution 5: Disable Multi-Window And Close Background Apps
When you use multi-window or picture-in-picture then overheat issues can occur. So, you should disable multi-window, and close all background apps. You should also remove the phone’s case and lock the phone. After this check overheat problem gets solved or not. If not then follow the next solution.
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Solution 6: Uninstall Culprit Apps
There are chances that some apps can create overheating problems in your Galaxy phone. So, you can boot your phone into safe mode and then check your device overheats or not. If it is not then it is clear that some apps are culprits for it and to fix this problem you need to find those apps and uninstall them.
Here, follow the steps to enter your Galaxy S21, S21+, and S21 Ultra into safe mode.
Step 1: Press and hold the Power button unless the menu appears on the screen.
Step 2: Now, tap and hold the Power Off option unless the Safe Mode icon appears.
Step 3: Tap on Safe Mode and then confirm it by tapping on OK button.
After this, your phone will reboot to safe mode.
Now, uninstall the culprit apps. Start with the recently installed app after which you have started to experience overheating issues.
Solution 7: Wipe System Cache Partition
You can also wipe the system cache partition in order to fix Samsung Galaxy S21+ overheating problem.
So, follow the below steps to wipe cache partition to fix overheating problem on Galaxy S21.
Step 1: Switch Off your Galaxy phone.
Step 2: With the help of a USB cable connect your phone to your computer.
Step 3: Now, you need to wait unless the message shows your smartphone is being charged.
Step 4: Next, press and hold both Volume Up and Power buttons until you see the Android Recovery menu option on the phone’s screen.
Step 5: Now, use the Volume Down button to highlight Wipe Cache Partition.
Step 6: Use Power button to select that option.
Step 7: With the help of Volume Down button highlight Yes and then select it by pressing the Power button.
Step 8: Once the process gets completed, Reboot system now will get highlighted.
Step 9: Press Power button to restart your phone.
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Solution 8: Use Power Saving Mode
When the power-saving mode is enabled on your phone then it disables all services like data syncing, network usage, location service, etc. This gives your phone less load in the background and helps your phone stay normal.
Follow the below steps to enable power-saving mode.
Step 1: Open Settings and then tap on Battery and device care.
Step 2: After that, tap on Battery.
Step 3: Then tap on Power saving mode and toggle the switch to ON position.
Solution 9: Reset All Settings
You can also try to reset all settings to fix the overheating issue. This will reset all settings of your device to its original settings.
Here, learn how to reset all settings of your Samsung Galaxy phone.
Step 1: On your phone, go to Settings > General Management > Reset > Reset all settings.
Step 2: Then tap on Reset settings button.
Step 3: If asked, enter the passcode.
Step 4: Confirm your choice by tapping on Reset.
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Solution 10: Factory Reset Your Galaxy S21/S21+/S21 Ultra
If the above solutions fail to fix the overheating issue on Samsung Galaxy S21/S21+/S21 Ultra then lastly you should factory reset your phone. But before doing it, you must create a backup of all data from your phone to a safe place as it will wipe all saved data from your phone.
Now, follow the below steps to factory reset your Galaxy phone to resolve the overheating problem.
Step 1: On your phone, open Settings app.
Step 2: Then tap on General management.
Step 3: Next, tap on Reset.
Step 4: Hit on factory data reset button.
Step 5: Now, enter your passcode.
Step 6: Lastly, tap on Reset Phone.
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Solution 11: Visit Samsung Service Center
If your Galaxy phone is still overheating then no option is left for you rather than visiting the Samsung Service center. You should repair your Samsung Galaxy phone through the official service center. Tell them the issue and they will fix it. Of course, they will take charges but the overheating issue will be fixed.
Bottom Line
I hope this guide has helped you to fix Samsung Galaxy S21/S21+/S21 Ultra overheating issue. I have mentioned all the possible solutions. If all the solutions fail then lastly you should visit the Samsung Service Center or if your phone is on warranty period then you can exchange your phone.

Jasper Madison is a passionate technical writer with more than 9 years of experience. She has a keen interest in Android and iOS and everything surrounding it. She is a technology enthusiast and fascinated with technology since her childhood days.