421# SAMSUNG USA SIM UNLOCK - A266U/A366U/S266V/S366V/F741U/F756U/F766U/F956U/F966U/S921U/S926U/S928U/S931U/936U/S937U/S938U/S731U/S926B/S921B/S928B - SUPPORTED CARRIERS ONLY [AIO,CHA,CCT,DSH,TFN,TMB,TMK,USC,VZW,XAU,MXO] - DIRECT SOURCE ⚡