Most cameras have their reset buttons on the back of the unit
To reset the device, look on the back of the camera for a little button called "Reset"
Press and hod for 15-20 secs until you get a prompt from the device stating that the reset was successful.
For some models, the reset button is hidden in the Micro SD card compartment under the lens.
- Rotate the lens bulb upwards
- Open the SD card compartment to locate the Reset button
- Hold the reset button for 15-20 secs until you get a prompt from the device that the reset was successful
See the photo below;