HOW TO TWEAK IMEI

Insert a sim in SIM 2 (if you want to change
sim2′s imei number) of that Tecno phone.
2. Download & install MTK Engineering Mode from play store.
3. Open it & click on MTK Settings
4. Then wipe your screen to left site to see Connectivity options.
5. Scroll down to CDS Information and tap on it.


6. Then, look for Radio Information, tap on it and you'll see something like:
Phone1 -
Phone2 -.



7. Select Phone2-
8. You will see AT+
9. Type any letter in the search box after AT+ and delete the letter you typed.
10. Then choose Phone2 which display something like this: AT+EGMR=1,7,""
11.  Put cursor in the middle of "" and insert your 15digit IMEI, for 1.5GB IMEI, it should look like:
AT+EGMR=1,7,"353709060433432"
12. After that, select SEND AT COMMAND
13. You will see a message "AT Command Msent"
14. Close everything and restart your phone.
15. Wait till they send you a configuration message.
16. After that, go to compose message and text;