As described in the screenshot below tap on SIM 1, enter your IMEI number then click on Write IMEI.
If the change is successful, you will get a pop-up like the one below.
NOTE: The Write IMEI button seems not to appear on all MTK android marshmallow phones as it doesn’t show up on my Infinix Zero 3. I can’t explain why.
Repeat the same procedure for SIM 2, then reboot your phone.
The invalid IMEI error should be gone and you should now be able to make calls, send sms and use mobile data on your MTK android marshmallow GSM device.
Don’t forget to share and let me know in the comment section if this works for you or not.
You’ll also like:
Please share this article to help others. Thanks