QUOTE(sopol @ May 3 2011, 04:45 PM)
Hi all, my unit is a locked version to at&t and jailbroken. Ios 3.0.1. Modem 4.26.08. It seems that my iphone has been lagged and unable to download new apps.
My problem is i dont know how to jailbreak and unlocking if i upgrade the software to the latest version. Moreover i am too busy to read and learn the processes which are too complicated for a non-IT person like me. Appreciate if you guys could advise me the fastest and easiest way to get out of the problem..
I supposed you're using a 3Gs?
Whatever you do, you will need to preserve your baseband so DO NOT use redsn0w.
You will need sn0wbreeze if you're on Windows or pwnagetool if you're using a Mac.
These 2 programs is used to create a custom firmware where it will strip out the part where the baseband is updated.
I think for sn0wbreeze tutorial, the best site would be redmondpie and if you're using a mac, the best tutorial for pwnagetool would be iClarified.com
The tutorial are simple to follow. Any problems just post it here.
Good Luck.