Mark S.
Good service but not transparent enough!
Ordered the standard unlock, and in less than 24 hours I was notified that it hadn't worked and immediately refunded. Then I tried the premium unlock, which took 4 days, but it worked! I'm very happy with it. My only qualm is that the website did not explain why my standard unlock didn't work, and what the benefit of the premium unlock was.
Response from attunlocker.usMar 4, 2015
Thank you for your review! In some cases, due to the history of your IMEI, we may need to use a more expensive gateway to unlock your iPhone. It happens in less than 1 % of the cases.