I've had my Samsung S21 5G for 7 months now and for the last few months I've been having problems with my phone. Randomly my phone restarts and I can't return it because it isn't under warranty because of a little scratch on the phone itself.. But my phone starts to overheat then it freezes the screen with a little line of different going across the screen then it restarts and it does this about 7 times before it finally wants to work..
i see its a pretty common thing with your phone, try the things on the attached pics, also i attached a note from a reddit user that Had The same issue as yours see what he says that fixed his
Hello, thanks for reaching out about your S21 overheating and restarting. I can certainly understand the frustration and concern over this device behavior. IN addition to the troubleshooting provided by @terminator9 there is a handy guide on maintaining the device's temperature: https://www.samsung.com/us/support/answer/ANS00076952/
If the troubleshooting is not helpful, the phone will need to be evaluated by a certified technician. For service in the U.S., you can take the phone to a local U.S. walk-in service location https://www.ubreakifix.com/samsung or to ship the phone in for service, please reach out to us via one of the following options: 1. Facebook Messenger: http://m.me/samsungsupport 2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513- 3. Private Message: https://bit.ly/3hzZfw8 If the PM link is not working for you, you can click on my name and send me a private message directly from my profile.
