Dear BroPlaying with this handset for 10 days
Success 1000% by HardnSoft
Vivo Y71 IMEI was corrupt due to flashing
No backup anywhere
View attachment 31932
View attachment 31933
Whole process here
Thanks to UMT Dongle
1.First downgrade full flash with version PD1731F_EX_1.6.3
2.Turn on phone and complete settings
3.Then write eng modem file with umt qcfire
4.Turn on phone enable diagnostic port by code *#558#
5.Then use qualcomm imei write tool
6.reboot phone to see changes
7. then write original modem only from firmware
Job done
plz Eng modem file send