1. Double click

2.

choose IMEI

3. choose this one

, then input the 15 digit of IMEI, like below

4.

5. power off Tab, plug in charger, connect USB cable to PC and tab. press volume down(- )and hold meanwhile press reset. (if it is

first time then computer will show install driver ). after that it will show below

click write IMEI button,

. after 5 second it will be success and show below