My phone currently running on version 3.1.2 and I want to upgrade it to 4.0 or 4.0.1 or 4.0.2 to use multitask and so on. But if I upgrade it thru iTune it will upgrade to 4.1 which currently will lock my phone with AT&T, and I don't preferred.
Can anyone tell me how to upgrade it to version 4.0.x and which I will can unlocked it with ultrasn0w? my phone specification as below:
Iphone 3GS 16GB
Version: 3.1.2 (7D11)
Model: MB715LL
Modem Firmware: 05.11.07
Bootrom Loarder: 359.2 (new bootrom)
YOU WILL GET 10POINTS FOR BEST ANSWER.
Thanks,
Wong
Can anyone tell me how to upgrade it to version 4.0.x and which I will can unlocked it with ultrasn0w? my phone specification as below:
Iphone 3GS 16GB
Version: 3.1.2 (7D11)
Model: MB715LL
Modem Firmware: 05.11.07
Bootrom Loarder: 359.2 (new bootrom)
YOU WILL GET 10POINTS FOR BEST ANSWER.
Thanks,
Wong