From: Gavin on
If an iPhone has been jailbroken and then carrier unlocked, what
happens if the phone is updated with an official upgrade - does the
carrier unlock stay with the phone, and if not, why not?

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From: ray on
Gavin <gwilbyREMOVE(a)stoof.co.uk> wrote:

> If an iPhone has been jailbroken and then carrier unlocked, what
> happens if the phone is updated with an official upgrade - does the
> carrier unlock stay with the phone, and if not, why not?

If the unlock is the result of jailbreaking the answer is no. An iOS
upgrade usually updates the baseband as well.
An official unlock from the carrier will stay.
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