- Insert an unacceptable SIM card to locked phone, now phone should ask unlock code (NP code?). Easy just enter code.
- Not working?, alright now remove the SIM card and try this code ###825*09# . got the prompt for code? enter the code.
- Failed above, try *983*8284# . It should work.
- Try *983*865625# also it’s working on few models of ZTE phones like F102