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There are no settings. It just happens. It won't show up when you receive the call, but it is in the recent calls.

TEG

but i dont have it in recents...when i click the tiny blue arrow i only have the date and time underneath the number...
 
but i dont have it in recents...when i click the tiny blue arrow i only have the date and time underneath the number...

On mine it only appears if the phone number is in full 10 digit form. If you dont have the number saved with area code then you wont get city information.
 
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