Check YouTube on how to access the recovery mode it not complicated but if you use power button + volume down that is only going to restart the phone.For recovery mode I think:1 connect phone to computer2 press power button + volume down togetherUnti...

I also don't no but u can't access the recovery mode if it not connected to a computer via USB cable

But you will need to connect it to a computer

If factory reset does not fix the problem than try recovery mode and clear cheches. I reseted my phone before the December security update and I haven't experienced another crush. My games are working fine and I can multiple task up to 5 apps open at...

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