Want iphone, but At&T not in my area

[scooterguitar]

ATT' service is splotchy at best in my area, many neighboring towns show no coverage, but I want an iPhone.
What other carriers might work or how would I find out? I know T Mobile will.
So, if I find a carrier, then I have to purchase an iPhone and unlock it, correct?
I looked for stickies on this stuff, but couldn't seem to find any.
Thanks

 

[McGiord]

Check here for instructions:
http://www.hackthatphone.com
Any GSM carrier will work.

[edit: the iPhone only works with GSM carriers]
________
drug testing

 

[scooterguitar]

Thanks.
Alltell is the best carrier (by far) in my area (northwest Ohio), but they are not GSM, so my understanding is it will not work, is this true?