Vivo phones require an unlocked bootloader to accept modified firmware.
Improper installation can cause boot loops or permanent data loss. Execute these steps before handling any system files: vivo v5 android version 70 update portable
Because the "vivo v5 android version 70 update portable" refers to a highly specific and often misunderstood topic in mobile modding, downloading a portable firmware package is the only way to upgrade this classic device beyond its official limits. The Vivo V5 originally launched with Android 6.0 (Marshmallow) and officially topped out at Android 7.1.2 (Nougat) via Funtouch OS 3.2. Vivo phones require an unlocked bootloader to accept
Select or Phone Storage , then choose the firmware file you just moved. The Vivo V5 originally launched with Android 6
Official smartphone updates are usually delivered directly to your device via Wi-Fi. For the Vivo V5 (model number 1601), official support ended years ago. Why Look for a "Portable" Update?
Keep in mind that Android security properties prevent rollback procedures. Once you have successfully updated the device structure to Android 7.0 Nougat, the system blockages will prevent manual downgrades to Android 6.0 Marshmallow through standard local recovery channels. Android 7.0 Nougat - Android Developers