warning: not for phones with valid imei[undamaged], if tried may permanently remove your IMEI. first note down the imei of your phone which is under the battery... open dialer and dial [mtk engineering mode] *#*#3646633#*#* under connectivity goto "CDS information" tab or directly goto "CDS information" tab. goto "Radio Information" select Phone1, you can see AT+ at the top, touch it, and type AT+EGMR=1,7,"xxxxxxxxxxxxxxx" type your 15-digit IMEI in the quotes in place of xxxx... it will show a message like sent successful.......[i dont remember it...] now reboot your phone.... for second sim follow same procedure but, select Phone 2 in radio, and type AT+EGMR=1,10,"xxxxxxxxxxxxxxx" type your 15-digit IMEI in the quotes in place of xxxx... it will show a message like sent successful.......[i dont remember it...] now reboot your phone.... It works for my Micromax A88 canvas MUSIC if It says the command sending i...