Hard Reset via Recovery — Oppo A91
Optimized for A91 (Android 9.0 (Pie), upgradable to Android 11, ColorOS 11)
Factory Reset from Settings — Oppo A91
Optimized for A91 (Android 9.0 (Pie), upgradable to Android 11, ColorOS 11)
Enter Recovery Mode — Oppo A91
Optimized for A91 (Android 9.0 (Pie), upgradable to Android 11, ColorOS 11)
FRP Bypass (Google Lock) — Oppo A91
Optimized for A91 (Android 9.0 (Pie), upgradable to Android 11, ColorOS 11)
Why reset your Oppo A91?
A hard reset on the Oppo A91 fixes boot loops, forgotten PINs and persistent lag. Using Volume Down + Power, you can access recovery mode and 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 Oppo A91?
Yes. A hard reset (also called a factory reset) erases all apps, photos, messages, and accounts, returning the Oppo A91 to its out-of-box state. Back up anything you want to keep before starting.
Does resetting the Oppo A91 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 Oppo A91?
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 Oppo A91?
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 Oppo A91 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.
How do I format my Oppo A91?
"Formatting" and "factory resetting" mean the same thing for the Oppo A91 — both erase all data and restore default settings. Use whichever method above matches your situation.
What is recovery mode on my Oppo A91?
Recovery mode is a stripped-down menu outside the normal operating system, used to wipe data or apply updates when the Oppo A91 won't boot normally. See the Enter Recovery Mode section above for how to reach it on this device.