Information On Localization Tecnique In Mi4

Feb 2, 2017
Hi everyone,
I know, it is a strange question...
A friend of mine had a Mi4 a couple of years ago for about two months, and when I called him from my cell the phone displayed the exact town where I was in that moment! We both were in Italy, I was travelling and he knew exactly where I was! I never found anything like that in other phones, and I would like to have something similar on my Mi5, as it currently displays me only the town of calls from landlines .

I don't know how the whole thing worked, I was using an old BlackBerry at the time so there couldn't have been an app that sent my location to him.

Any clue?