Constant Rebooting.

[GitClucked]

As of about 2 hours ago. My phone decided to constantly reboot. Not like.. Loads to a screen and random reboots throughout the day. But shuts off, turns on to tmobile screen, shuts off, rinse and repeat. I was able to access the reboot menu by holding volume up and power and did a factory reset to no avail. Anyone have any other tips?

[Flagg]

This could either be a corrupted operating system or a hardware fault. For the operating system you can look at up "unbrick samsung s21" you will need to download the firmware onto a sdcard. If it's a hardware fault contact your tmobile.

[GitClucked]

See.. I would love to do this. But when it infinite boots. It doesn't stay connected to my pc. Unless I'm just a dummy and am doing that portion incorrect as well.

[Flagg]

You are not connecting the phone to the pc you download the firmware via a pc onto a sdcard insert it into the phone to reinstall the operating system by entering the recovery mode.

[Pugs1957]

The S21 has no SD card slot.