Question

communication routes in the regions of high altitude?

Answer 1

Communication routes in regions of high altitude are now-a-days through helicopter (for closer distances) and through high altitude railways like the Ouinghai railway in China linking Lhasa (capital of Tibet) with the rest of the world. More information can be found on this railway from the internet.

Answer 2

Communication Satelite such as SATCOM is used for communication.

google has created drones which offer free internet 

 Wi-Fi feature has also developed in regions of high-altitude