How telecommunications are brought into your mobile?
In fact, it is very similar to the way internet is brought within your computer. In order to realize it, you just need to access to websites like https://www.ariase.com then, you enter your place and it will tell you the nearest locations where there is a telecommunication antenna next to you:
In my case, if I am reaching this red dot, this is what I will see:
In fact, that's probably one of the highest point within my neighborhood, so underground there are telecommunication cables in order to be able to broadcast waves at the top to all smartphones around.