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It's AT&T's responsibility to unlock the device since it's locked to their network. However, you must be an active customer of theirs for them to unlock it.
How to unlock Surface Duo AT&t?
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Anonymous
I've been trying to unlock this device unsuccessfully for over a year AT&t and Microsoft each keep pointing at the other one saying that they can't help unlock the device looking forward definitive way to do this in 2024?
Surface | Surface Duo | Install and update
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Anonymous
2024-08-04T23:43:51+00:00