Can you tether an iphone on at&t without jailbreak/blackra1n?

Can apps made with the iPhone sdk run on non-jailbreaked iphone's?

Is there any way to run apps made with the iphone sdk without jailbreaking?

Does jailbreaking my iphone could damaged it? Can I get it back to the original way?

Can anyone on here tell me how to jailbreak my iphone? I have firmware 1.2.0 (software 2.0) 3G can anyone help me please?

I can add the new music but it says it will erase my existing tunes! thats a big NO! Help please? :)

I have an iphone...but my provider is tmobile..and it wont work for the iphone...after doing research on the internet I found...

send me a link on funmail for downloading the software and rest here. i looked all over the internet. my device is MA model. ...

Is verizon free to other verizon cell phones even without the $15 card??

I plan on getting a 4S but i wont be using it to talk, just to text and use the internet, So i was wondering, with Verizon , ...

is there a way to get spotify on your iphone?