Download and install NSS

1.Connect you Phone with the USB cable
2.Now open NSS, scan the new device
3.Choose “phone info" after that select "read"
4.You can now see what your phone product code is.
5.At this moment you must modify the power mode to local
6.Your handset will restart in local mode,
7. Select enable the product code and write a new product code over there then click the "write" option .
8.Set power mode to normal once more and hit "read"