If IMEI is lost for various reasons
This is a way to rewrite it without using any software tool
Step 1: Press * # * # 3646633 # * # * and you will be taken to your phone’s EngineerMode.
Some phones can not be accessed with * # * # 3646633 # * # * Please log in with * # 15963 # *
Step 2: Find the CDS Information. Find the difference between one phone and one phone
If you find it, log in
Step 3: Enter Radio information again.
Step 4: When you enter the radio information, you will see Phone 1 and Phone 2
For both sims, you will see only one.
Step 5: Enter phone 1 and press E to type in the AT + field at the top. In the text that appears, select AT + EGMR = 1,7. To
find out, dial * # 06 # and you will see the IMEI you have added.
For phones with an unknown IMEI number
Install the sim on your phone and go to step 5 under Send AT COMMAND
You will see the IMEI number and the IMSI number. Once you have installed the sim on your phone, enter the number on
the IMSI number as I said above, then click SEND AT COMMAND as above and reboot the phone.