J327P SIM Unlock U4/BIT4/REV4 | J3 Sprint Invalid SIM card Unlock | J3 Emerge Boost Unlock
1. Flash J327P_U4_Unlock.tar
2. Enable Diag Port by typing ##3424# and select: DM+MODEM+ADB3. Run NV-items_reader_writer.exe
4. Choose Port, Click on "Connect" --> "Read" and then click on "Write" option, select NV file: J327P_U4_Unlock.txt5. Click on "Mode" --> Reset, phone will restart and will be unlocked...
This SIM unlock of Samsung J3 was tested on most recent version of J3 Emerge J327PVPU4ARF2, this may or may not work on older firmware version.