1. rooted android phone or tablet.
2. install android terminal emulator app
3. open android terminal emulator.
4. Type SU then press ENTER
5. type following command then Eneter
echo ‘AT+EGMR=1,7, “IMEI_NUMBER” ‘ >/dev/pttycmd1
6. if your phone is dual-sim, typ this command then ENTER
echo ‘AT+EGMR=1,10, “IMEI_NUMBER” ‘ >/dev/pttycmd1
7. Last step, reboot your phone/tablet and done.