Iphone 5 unlock and switch carriers? How to go from sprint to at&t?

Hey sorry i'm new to this. But basically my Girlfriend is getting Iphone 6 and is giving me her Iphone 5. So i'm reading on how to unlock it and switch carriers. This all seems really complicated. I understand that it has something to do with companies having certain frequencies that relate to their 4G LTE services. And so i'm wondering if there's some way, that is either free or cheap, that does not include viruses, that I can go from her Sprint service to my AT&T service, and use it to the fullest extent.

Is the iPhone front camera good?

Just wondering. Because every time I look at it I look very weird and ugly. My spots are being exposed even more and it shows so many imperfections. Plus there's a bright light coming from it aswell. My question is. That is what the iPhone front camera shows of myself what my friends see it do I look different and better? Also my nose looks massive on the camera

Why does iPhone show routes with tolls?

So I've gone to some of the locations I try to GPS on my phone to and they take me down the toll way to get there but the last time I went there I didn't go through a toll. It acts like that is the only way to get there. However why would it beset to take you down the toll way? I guess it may be faster, but I just want to get there. It doesn't matter if a different way takes longer. How do I get all the possible routes to show?

Is this covered by Apple's warranty?

I've had my iPhone 5s for approximately 4.5 months. About two months ago, I notice a hairline scratch on the screen. I didn't really notice it that much, so I just forgot about it. Recently, though, the scratch seems to have gotten worse. I now notice it more often, especially when looking at something light in color (mainly white). Will Apple give me a replacement for free? I read that hairline cracks are covered under Apple's 1-year limited warranty. I have this phone for the next to years and I just don't think I can live with the scratch on the screen. I have not once dropped my phone or put the screen near something sharp.

I'm wanting to sell iPhone 4s, but a little worried?

The phone is in great shape, no scratches or anything. I did the factory reset and all, but I read that there are still ways old info could be pulled up if the right hands get it.

I was going to sell to gamestop just for some quick cash, but I can't remove Sim card if I sell to them.

How much would i get if i sold my iphone 4 from?

I bought it about two years ago and it costed 500 dollars without a plan and it is in great condition with no cracks, scratches, or internal damages and i want to sell it to my local pawnshop, it has only 8gigs and i bought it from cricket. How much would i be looking at if i sold it to my pawnshop?