There's is actually a pretty simple way to do it, unfortunately it does not work on all devices. You might give it a shot!
- Enter one of these pins on the dialpad (this is the hardest part, it might not work on your device): *#7465625# or * # * # 3646633 # * # *
- The engineer mode should appear. Go to connectivity tab.
- Tap on CDS information
- Tap on Radio Information
- If you have a dual-SIM phone, you'll see two options. Select the one you want to change.
- Put the new IMEI number in the correct form:
AT +EGMR=1,7,”IMEI_1” and “AT +EGMR=1,10,”IMEI_2” (replace IMEI_1 and IMEI_2 with your IMEI number)
Where 9100XXXX.. is the IMEI number.
The walkthrough is for educational purposes only. Changing IMEI might be illegal in your country.