Software update

[Gopu57]

Samsung m21 August security update. 

[Bocianovvsky]

I have installed this patch on my Galaxy M21. Since it i have an issue with reboot of phone every 5-10 minutes. :(

Hope Samsung will fix it soon. It is impossible to go back to older version of software by Odin. Bootloader was changed. :(

[Gopu57]

You have to visit the service centre.