Problems After Android update I have a Samsung S6, I've recently (2 days ago) received a notification for a new update rolled out by Samsung which installed instantly. However, from that time i am in trouble with charging my phone. I am unable to charge it even if I've tried many Samsung original chargers. I get a gray battery icon, and i can barely switch on the phone (with 0% charge)

Do you have any solution for me other than reset my phone?
You could try checking your charger, if you buy a charger doctor (cost about £1). You can see if you have 5V and any current flow.

You could also check your battery voltage for around >3.6V - very carefully using a DMM. Those are suggestions I can think of from a hardware perspective. 

I try to avoid updates, but it seems hard to believe it would cause that much trouble!?