Since the stock Vivo firmware is heavy (Funtouch OS), you can try porting (Android 7.1.2) to this device (MT6750 chipset).
The device will automatically search for any available "portable" OTA (Over-The-Air) packages provided by vivo. Manual Installation (Firmware Package) vivo v5 android version 70 update portable
Disclaimer: This article is for educational purposes. Modifying your device’s software voids warranty and carries risks. The author is not responsible for bricked devices or data loss. Since the stock Vivo firmware is heavy (Funtouch
Open the File Manager , tap the update package, and select "Update Now." Alternatively, you can enter Recovery Mode (Power + Volume Up) and select "Install Update". 4. What About Android 7.0 Nougat? tap the update package
the latest official Funtouch OS firmware to resolve performance issues? V5 Funtouch OS PD1612F_EX_A_3.14.9 System Update - Vivo