Update 3G iPhone iOS 3.1.3 to 4.2.1 Preserve Baseband 05.12.01
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5:39
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@xdarkdragonx01 you really have a 3G phone still at 3.1.3? I wouldn't update to version 4 it's really slow on the iPhone 3G.
But if you do need help I'll update the video description with some links.
idjmic 4 months ago
@momsekker if you have no SHSH backup whatever version of firmware you are upgrading it has to authenticate with apple or cydia and one of them have to have the baseband or it will fail in iTunes
idjmic 5 months ago
this is the first time updating and i dont have the shsh for 4.2.1, can i update for the first time with a Custom IPSW????
momsekker 5 months ago
could you provide the link to download the custom ipsw that you used?
xdarkdragonx01 7 months ago