start testing

Open the device's dial pad.
Enter the USSD code sequentially by pressing the following keys: * , # , 0 , 6 , # .
Observe the screen to check if IMEI1 and IMEI2 are displayed.
Verify the length of IMEI1 (must be 15 digits).
Verify the length of IMEI2 (must be 15 digits).