REFERENCE Zte Z331 [AT&T] unlocked by Sigma Box

[Yongitechz]

Lock from At&t

Tools :

Sigma box
Usb cable

Procedure:

1. Open Sigma Software
2.Connect usb cable
3. Install zte driver
4. Select Qualcomm
5. Select port
6. Press direct unlock


Screenshots:

https://imgur.com/GluTEl2

https://imgur.com/xNSI4sL

Finish Product:

https://imgur.com/BYQtdOh

https://imgur.com/4WAw8WM

For reference........tnx 4 viewing!!!
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