Make sure knox is 0 (knox 1 not supported )
Check On Download Mod Knox= 0 | Setting - About - Knox = 0 Only Supported
Note: T-mobile apps, Metro APP Unlock and Sprint samsung not supported
Read Serial No by z3x and submit Serial only and get MSL code and enter this code by z3x box to get Network unlocked
Strict Policy: The Code is Originally From Database and Calculated With Serial.
This supplier Don't refund in any case please do not use any fake or wrong serial or do not force for Verification or refund