Upgrade issues

[cupps]

Anyone else had issues after the upgrade? 

I have a s 21,and after doing the upgrade this morning ,fone keeps telling me system error ,or it overheats , or doesnt allow screen shots? Anyone else ?

[JstLykDt]

Clear cache

[Tendai777]

Backup data and reset phone if clearing cache doesn't work

[SamsungComm1]

Hi cupps

Apologies for the inconvenience caused.

Before factory resetting your device, you can factory reset your device, please  soft reset the device. Press and hold the power and volume down buttons for about 10 to 15 seconds (this will not erase your data, it is just to reboot the device)