how to repair Vivo y51l imei repair 100&

Vivo y51l IMEI repair done this method without root

Code:

Process to enable diag port 
1)type this code *#558#
2)Go to quality verification test
3)scroll down and tick on debugging port

1.open miracle box tool

2. use cdma quallcomm button

3.scan port

4 .chekh write imei

5.type imei xyz 

6.press start button

7.enjoy