Hard Reset via Recovery — vivo X21 UD
Optimized for X21 UD (Android 8.1 (Oreo), Funtouch 4)
Factory Reset from Settings — vivo X21 UD
Optimized for X21 UD (Android 8.1 (Oreo), Funtouch 4)
Enter Recovery Mode — vivo X21 UD
Optimized for X21 UD (Android 8.1 (Oreo), Funtouch 4)
FRP Bypass (Google Lock) — vivo X21 UD
Optimized for X21 UD (Android 8.1 (Oreo), Funtouch 4)
Why reset your vivo X21 UD?
A hard reset on the vivo X21 UD fixes boot loops, forgotten PINs and persistent lag. The method above will wipe the device back to factory condition. Always back up your data first, as a reset cannot be undone.
Frequently asked questions
Will a hard reset delete everything on my vivo X21 UD?
Yes. A hard reset (also called a factory reset) erases all apps, photos, messages, and accounts, returning the vivo X21 UD to its out-of-box state. Back up anything you want to keep before starting.
Does resetting the vivo X21 UD remove the SIM lock or carrier lock?
No. A hard or factory reset only clears data and settings — it doesn't remove a carrier/SIM lock, which is tied to the device's IMEI at the network level. You'd need to contact your carrier for an unlock.
How long does a factory reset take on the vivo X21 UD?
Typically a few minutes, though it can take longer on older or heavily used devices as more stored data has to be wiped.
Will I need my Google account password after resetting the vivo X21 UD?
Yes, if Factory Reset Protection (FRP) is enabled. Android (and HarmonyOS 2.x devices with Google services) will ask for the last signed-in Google account after a reset — make sure you know that password first.
Can I factory reset my vivo X21 UD without the password?
Yes — resetting through recovery mode doesn't require your lock screen password, since it bypasses the login screen entirely. That said, Factory Reset Protection may still ask for your Google account credentials afterward as an anti-theft measure.
What is recovery mode on my vivo X21 UD?
Recovery mode is a stripped-down menu outside the normal operating system, used to wipe data or apply updates when the vivo X21 UD won't boot normally. See the Enter Recovery Mode section above for how to reach it on this device.
Does my vivo X21 UD have a hard reset button?
Not a single dedicated button — the vivo X21 UD uses a button combination instead of one labeled "reset." See the Hard Reset section above for the exact keys to press.