Hello everyone, i have an At&T Iphone 3g 8gb version 2.1 and modem firmware 02.11.07 with at&t 2.6 and i have had my iphone unlocked with the ismart sim card for almost a year now with no problems. My dilemma is i want to upgrade to 3.1/3.01 firmware and of course there is no turbo sim/ ismart sim/ rebel sim available as yet and i am tired of waiting because i want the new features and the ability to install the updated apps. It is a MUST that i am able to unlock before i upgrade as i use it mostly in the Caribbean. I have NEVER jailbroken my iphone because the ismart sim was so much easier and i am not into all the hacks. I just want the iphone carrier unlocked is all. I wanted to know if i jailbreak unlock with ultrasnow or pwned or one of those programs, can i delete cydia after i unlock it and also i wanted to know if after i jailbreak, will the app store still be usable?? (As I use it daily) Also, can someone also recommend the EASIEST unlock right now for 3.1/3.01 and a link to a guide?? 

All suggestions would be appreciated.
Thanks
All suggestions would be appreciated.
Thanks