If you’ve been with Tesco Mobile for 12 months or more ... but have not got the original SIM card, or if you have acquired a locked iPhone from someone else, you may need to reset the phone ...
Apple's iPhone brought the SIM lock into public view because of its original exclusivity in the U.S. with AT&T. However, iPhones were readily "unlocked" by hackers both in and outside the U.S ...
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