Vivo Y71 (PD1731F)
Firmware Link:
1. Download file and extract
2. Open unlocktool
3. Select Qualcom menu
4. Check server
5. Select brand: Vivo
6. Select model: Vivo Y71
7. Select Firmware folder
8.. Click Flash
9. Baklasin ang Unit
10. Tanggalin ang Battery
11. Testpoint
12. Insert USB Cable
... Wait until done
...