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How to flash the firmware?

How to downgrade my phone?

Where can I download ROM or firmware for my phone?

Can I downgrade my phone to the lower Android version?

How to unlock Bootloader(BL)?

Can I install the firmware of other phones in my vivo phone?

How to access Recovery mode?

It prompts "Decryption unsuccessful" while installing the firmware. What should I do?

How to exit the Fastboot mode?

Is there an international firmware for the phones such as X21 sold in Chinese Mainland?

vivo & Google account
Backup & vivoCloud
Find my phone
Lag & Stuck
Storage & File Manager
Music & Video
Personal Hotspot & Wi-Fi
Purchase consulting