My iPhone turned off and won't turn back on?

I set my phone down while i was on the computer, didn't use it for like 15 minutes, and when i looked at it the screen was black and it shut off. It was on like 80% battery so it didn't die. I tried plugging it in to the charger to see if i could get it to turn back on but it will not turn on. I don't know what happened!

How to block a number on the iPhone 4s for AT&T?

This is like URGENT.

Like i said, my carrier is AT&T and i have the iPhone 4s. I would like to block a number from texting me and calling me continuously. Without jailbreaking my phone, someone please help a sister out with blocking this person's number. I recently read that there's a way for verizon customers to do so. If that's the case, then i think its only fair that AT&T has SOME WAY. Please Help A SISTA OUT! PROVIDE DETAILED AND ACCURATE INFORMATION THAT ACTUALLY WORKS! I CAN'T STRESS THAT ENOUGH! Please RESPOND BACK A S A P!

How to crop the video that i made?

So i used my iPhone as a video camera because it has superb quality; it has the same quality as a capture card. But because my TV is too wide and big, the video shows the edges of the TV. But it still has a great quality
Here what it looks like:

What programs can i use to crop the video?

Transfer old number to micro sim?

I got a iphone 4s with a micro sim, i want transfer my old number and detail from big sim card on to the new micro sim. How do i do that? I'm on t-mobile in UK