Samsung J730F Fix (IMEI) Null U3 Solution EFS File 100% Tested Without Credit
How To Flash:
1:Download and install device driver software on your computer.
2:Download and extract the Stock ROM (Official/Original Firmware).
3:Download and extract Odin on you PC.
4:Boot your Samsung device into Download mode.
Power off your device
Press and hold Volume Down key, Home Key and Power Key
When your device vibrates, release Power key while keep holding the Volume Down key and Home key
Press Volume Up key to enter Download mode, which has a green robot figure and “Downloading… Do not turn off target!!)
5:Connect your device to PC then Device is connected to Odin.
6:Click “PDA” or “AP” to add tar.md5 file that you have extracted and then “Start”