Comment by denysvitali

My guess is that this data is actually used for network analytics by the carriers and to determine if the device connecting to the tower should switch to another one.

This data is vital for a mobile carrier to make sure to have a good signal coverage under all the possible conditions.

It's just a guess since I've seen similar data being analyzed in a previous telco I worked at, but I don't know their exact source. The goal there was to improve the network quality. I guess you can do the same w/o GPS, but triangulation with cell towers is very coarse.