I follow the procedure to upgrade to Ios5 and when I do the restore,only option given is updating 4.2.1
Iphone 3Gs,MVN attmvno,thru straitalk,
not ready to get the 4S yet,
Will I be able to upgrde the OS?
Sounds like you may have an iPhone 3G, not a 3GS. Please check the model number on the back. A1241 is an iPhone 3G and can not be upgraded beyond 4.2.1
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