Not Supported Models:
- IMEI’s starting with 9900
- Samsung T-Mobile models like Galaxy S3, S4, Exhibit, Note 3 and older models.
Unsupported Models :
- IMEIs starting with 9900 and Verizon Devices*
- Any Samsung Cell Phone from T-Mobile USA with "Mobile Unlock App" installed and that are not asking for SIM Network Unlock PIN (like some Galaxy Avant, Galaxy 6 Edge, and probably more to come in future...)