Can I switch a Verizon iPhone 4S to the Sprint Network?

I've recently acquired a Verizon iPhone 4S & have heard that it's possible to flash a phone over, though through my searches have found sometimes it's NOT possible. I'm not interested in doing it myself, but rather gettingit done, is this possible or not? Are there places I can go to get it done? Can iPhone's be flashed?

Iphone app that saves photos?

Is there an iphone app that will save your photos for me. What i mean is that if i take a picture but accidently delete it (being the clumsy person i'm) is there an app that out back it up to somewhere else.

I will be going on holiday and i want to take photos but i'm just afraid that i will lose them or something.

Added (1). So there's not an app that i can put my photos in and they can't be deleted?

Sprint or T- Mobile! Can't decide?

I heard that T- Mobile is coming out with the iphone 5 so i'm considering of getting that but Sprint is also great. I want one with great coverage and have an unlimited plan. I live around San Jose so which one has better coverage at a great price? I'm thinking of getting the Iphone 5 32gb.

My iphone 4 won't connect to my PC

My PC makes the bing sound of it being plugged in, but the iPhone doesn't show up on iTunes, or pop up as a camera. I desperately need to download pictures to put on a website but now it won't even connect! I tried troubleshooting and nothing worked.