This feature will completely erase all the data stored in your device, including any settings you've configured. It's advised to log out of your accounts beforehand.
Steps to erase all content and settings on Oppo F5 are as follows:
Step 1: Access Additional Settings.
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Step 2: Go to Backup and Reset.
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Step 3: Select Restore Factory Settings.
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Step 4: Choose Wipe All Content and Settings.

That concludes the setup; best wishes to all of you.