I think this is a super Samsung phone: Samsung Galaxy Fold. Thank you, Franco!
You can see in my video: Samsung Galaxy Fold with F900U model. Its an AT&T locked-model and it will ask Unlock code once you put non-AT&T sim.
Our service can unlock Samsung Galaxy Fold that is locked AT&T network, i think it’s one of first Fold phones to be unlocked in the world.
What is procedure?
1. Check imei of phone. It’s very important.
2. Insert a sim for checking. We should sure sim card slot is working fine and Samsu