Write IMEI of your Android phone with secret code in Engineering mode:- Just enter this code in dialler:- *#7465625# or * # * # 3646633 # * # * Now Tap on Call pad or connectivity option or you have to slide the screen. Just Look for CDS information (Common data service information) option. You will see Radio information there and after tapping on it. If you have dual SIM ANDROID then you will see TWO option select any one on which you want to write IMEI with. Now you will have to put your IMEI no in this manner :- “AT +EGMR=1,7,”IMEI_1” and “AT +EGMR=1,10,”IMEI_2” (replace IMEI_1 and IMEI_2 with your IMEI no) and tap on send command button. for Example :- “AT =EGMR=1,7”9100XXXXXXXXXXXX” thats all now restart your phone..! Note:- plz try at ur own risk . And its not personally tested by me.