Unlock your Oppo F9 (F9 Pro)

OS: Android 8.1 (Oreo); ColorOS 5.2

CPU: Octa-core (4x2.0 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53)

Display: 6.3 inches, 97.4 cm²

Battery: Non-removable Li-Po 3500 mAh battery

1. Use the Tenorshare 4uKey for Android app.
2. Make a hard reset (factory reset).
3. How to use a low battery to unlock a phone locked with a graphic key.
4. Delete 'gesture.key' and 'password.key' using Aroma File Manager.
5. Restore access to your smartphone using your Google Account.

1. Use the Tenorshare 4uKey for Android app.

Connect your phone to PC and launch Tenorshare 4uKey for Android.
Press the Remove button in the menu that appears on the PC screen.
Smartphone screen lock removal will start.
After finishing the lock removal process, put your phone into recovery mode.
Click the Next button, then follow the steps recommended by the program to restore the device to factory settings and reboot it. After starting the smartphone, the screen lock will be disabled.

2. Make a hard reset (factory reset)

To get started, turn off your smartphone.Simultaneously press and hold for about 10-15 seconds one of the button combinations:
Volume down button + Power button;
Volume up button + Power button;
Volume down button + Power button + Home button;
Volume down button + Volume up button + Power button.
Select Recovery using volume up/down buttons to navigate through the menu and confirm selection by pressing the power button.
Using the volume up/down buttons to navigate through the menu, select Wipe data/factory reset. and press the power button.
Finally, confirm the reset operation.

3. How to use a low battery to unlock a phone locked with a graphic key.

You need to make sure that the battery of the phone is discharged.
When the battery has a few percent left, the phone will report this and open the menu with power settings, that is, it will unlock the phone.
You need to open the menu with security settings and turn off the phone lock.

4. Delete 'gesture.key' and 'password.key' using Aroma File Manager.

Turn off your phone and prepare a memory card.
Transfer the Aroma File Manager program using a computer to the phone's memory card. Insert the memory card back into the phone.
Using the combination of volume and power buttons, put the smartphone into recovery mode.
In recovery mode, select the option Install zip -> Install zip from sdcard -> Choose zip from sdcard, go to the archive folder with this program and select it.
You will need to go to the /data/system folder and delete the files 'gesture.key' and 'password.key' (if you have Android 4.4 or lower) or 'getekeeper.password.key' and 'getekeeper. pattern.key' (if you have Android 5 or higher)
Restart your smartphone. The block will be removed.

5. Restore access to your smartphone using your Google Account.

After unsuccessful attempts to unlock the phone, Forgot password? will appear on the phone screen. Click on it.
You will need to enter your Google Account username and password.
Remove the screen lock.