What's the cheapest carrier for an iPhone?

I just moved to an area where I get no reception with my iPhone 4. I'm with ATT and it costs me $70 dollars a month to NOT use it! Is there a cheaper carrier that takes the iPhone? I only use it now once or twice a week when I travel outside my area. I have a home phone.

Is there any app for tracking my iphone if it gets stolen? Read Details?

Like if someone steals my iphone at school i can go on the website and track it, find EXACTLY where it is so i can go to the place and get it back?

Added (1). Oh i do have Find My iPhone on, but one time when my dad took it to the store and didn't come back i got on the icloud web and to see where my iphone was to see where my dad was and it was worthless!

Iphone picture effects apps?

Is there any picture apps that make your pics like this?
http://weheartit.com/entry/57546253
thanks guys

Added (1). I mean like that Matte look?

IPhone stuck on apple logo after resetting and won't connect to iTunes?

Ok so I reset my iPhone (settings-general-reset entire phone) and now it's frozen on the apple logo with a loading wheel, I know how to fix it but the main problem is that I actually never connected my iPhone to iTunes and I just recently downloaded iTunes but my PC won't read my iPhone… Can anyone help me on how to fix it without connecting it to iTunes?

Help printing wirelessly with iPhone?

I'm just trying to print stuff wirelessly using my iphone and that particular printer. I got the app and it says I have to go to setting sto some wirelessly thing i don't know my printer doesn't have that. I need Help Finding Claim Code On Hp Photosmart A646 (that's the kind of printer I have), can't find that either. My printer does have Bluetooth and when I turn it on my phone shows up on the printer screen, so I click on it, I wait for my phone to see if the printer shows up on the phones screen, nothing shows up. I go to click on a photo on my iPhone I hold it so it shows all settings I click print, it says no Air Printer. I give up.

Any apps to talk to random strangers?

Like I know there are a bunch of apps like chat rooms and stuff. I don't want an app where I can go on and talk dirty to people. Just like talk. Casually. To strangers. Nothing naughty. Any good apps for my iPhone?

Any way to post photos to instagram by computer?

No, not by iPod or iPhone, by computer. I know there's not going to be a really straight answer, but if anyone knows some back way. And I already have an account. Its a macbook pro by the way.