Open the photo in a geotagging app or photo editor that supports location metadata
Enable location services on your device
Add the latitude and longitude manually or select the location on a map
Save the updated photo metadata
Use desktop software to edit EXIF data if needed
Import the photo into a GPS photo tagging tool
Match the photo with GPS track logs if available
Sync the photo with the correct time and location data
Export or save the geotagged version of the photo
Verify the location data using photo metadata viewer tools