When i turn off my iphone 4 it won't turn back on?

When i turn off my iphone 4 it won't turn back on, like it'll show that apple sign until i plug it into the charger, people tell me i should restore my phone but will it delete all my pictures and music?

How to get a nano sim card from orange?

I'm currently on an iphone 4s orange contract, but i will be purchasing an iphone 5. Will i be able to get a nano sim from orange?
and how would i get 4g, would i have to transfer to EE (if i'm even able to)

Activating an unlocked iPhone 5 for tmobile?

I bought an unlocked Sprint iPhone 5. But when I put in the tmobile sim card it says that it is an incompatible sim and not supported. Yet on the top corner it shows that it has 4g signal. When I send a txt to the tmobile number. I can see that it did get to the iPhone when i remove the tmobile sim and go into messages. Someone please help.

Added (1). Also, when I first put in the tmobile sim card, in the about section in the carrier field, it does say tmobile but when it searches for signal it changes to "no service" and restarts a screen that says the sim is incompatible.

My iPhone 5 camera is blurry

I thought it may have been my LifeProof case had a smudge on it or something, so i took it off, and it was still like that. The back camera will not focus and is blurry. I just got it 2 wks ago and it hasn't been dropped or gotten wet. Its only the back camera. Can anybody help?