Recently I have purchased iphone 3G 16 gb and how can I upgrade this iphone with latest software.
Also, after upgrade how to unlock to use with our local Settings.
please advise on this
If you have brough the iPhone with a valid celluar contract then you just need to plug the iPhone into iTunes and then update it. It will get updated and then be activated..
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Unlocking an iphone often alters enough of the system that upgrades can cause crashes and Apple will no longer service the phone after unlocking.