I have a 3gs which is currently jailbroken and on IOS4.1, it has also been unlocked by the carrier.
It is the old bootrom and on modem firmware 5.11.07.
How do i update to 4.2.1? Will i loose the carrier unlock?
I have a 3gs which is currently jailbroken and on IOS4.1, it has also been unlocked by the carrier.
It is the old bootrom and on modem firmware 5.11.07.
How do i update to 4.2.1? Will i loose the carrier unlock?
So is there any reason why i should or shouldn't upgrade the baseband as well?
It was Unlocked by O2 and is on a vodafone sim
thanks
Once you update the OS on your phone to 4.2.1, the baseband will be 03.15. So, in order for you to unlock it, you will have to use upgrade the baseband to 06.15 which is Ipad baseband. Ultrasn0w will unlock this Ipad baseband. However, there are complains that GPS is not working properly when the Iphone 3G/GS are running on Ipad baseband 06.15. So, it is all depending on what you need.
Sorry guys. It is my bad that I missed the "Carrier unlock" part. So, if is carrier unlock, then there should be no issue to upgrade to the latest IOS. Only slightly issue is that the latest OS has to be tethered boot up every time the battery runs out or the device is turning off. Otherwise, he is good to go.