I plugged my phone up to three different chargers still no charge

my bios wont boot up with the key combination what do i do

i was hearing music and my phone suddenly died without any reason it was charged well and i put it on charger for 2 hours but it didn't work i tried to transfer data using my phone explorer app and mobilego but both didn't work how can i transfer my data to the computer?

Yes I'm wondering is there a way to get my phone activated cause my mother in law mailed me a phone with no box or receipt unfortunately Walmart didn't scan my phone and won't scan it without the box any suggestions

I have a broken flex cable on my iPhone 6 home button. It's completely cut in half. Is there any way to repair? I didn't do this. LOL Im a repair guy. This is shoddy work a customer wants me to try and fix. Error 53 is solved BTW right? Honestly haven't had issue with error 53 before, so I suppose it sounds like a stupid question.

I do not have retail mode on my device but I found these instructions:

Go to "Settings, then scrolling down and selecting General Management, and finally Retail Mode. This will bring up a screen asking if you want to turn it off. You can also do this by going to Settings, Backup and Reset, and finally Backup Storage  -  Backup Options. Then select Retail Mode Turnoff."

On several sites they say the password is 5444

It is also mentioned that if demo mode is all that works, it is a stolen phone and only samsung can fix it. If that's the case possibly you got tricked into buying a stolen phone?

Okay so I reset the computer to factory reset and everything and I installed windows 10 but sometimes or most of the times its slow like slow. Is there anything i can do about it?

When I'm playing a game on my phone and someone rings me, the phone doesn't ring.