i buy iphone in usa with at&t last year
i went to home korea
i changed my iphone in apple care
my previous iphone is apple now, new iphone is mine
my previous iphone is at&t lock, so i tried to unlock att website(www.att.com/unlockdevice)
but it doesn't work because previous my iphone is apple, so my previous iphone imei is on blacklist, so i caanot unlock my iphone
and new iphone cannot also unlock because apple toss previous information to new iphone
so i called apple korea, apple korea said that is not slove problem, because the lock is att's lock
so i called att company, att said we had your previous iphone imei lock, so new phone imei cannot unlock and previous iphone imei also cannot unlock because your previous iphone is blacklist.
how can i unlock my iphone ?
i think att ask apple korea for my previous iphone change new phone,
if that is true, att is iemi change(previous iphone imei ->new imei) or att can use unlocking previous imei.
help me plz....