The OPPO F5 is a solid smartphone, but over time, any device can become sluggish, experience software glitches, or fill up with unwanted data. A (also known as a factory reset or master reset) is the best way to return your device to its original, out-of-the-box state.
You will lose everything. Save your photos and contacts first. How to Hard Reset OPPO F5
: A hard reset permanently erases all data from the phone's internal storage, including photos, contacts, and apps. The OPPO F5 is a solid smartphone, but
Press and hold the Volume Down and Power Button simultaneously. but over time
using the volume buttons to navigate and the power button to confirm. Wipe Data:
How to Hard Reset Go to product viewer dialog for this item. : A Step-by-Step Guide