How to turn on mobile device location permission?

For iOS

1. Go to Settings 
2. Tap Privacy
3. Tap Location Services
4. Toggle the switch to On

For Android - 

Android 10 or above

1. Go to Settings 
2. Click on Location
3. Toggle Use location to switch On

Android 6 or above

1. Swipe down from the top of the screen (to show notification centre)
   
2. Tap on Location icon

Note : This may differ depending on the user’s device manufacturer and operating system version. Please refer to the phone’s manual or support site.