In the area where I live, in South San Jose, CA, the data coverage is very poor. Sometimes the data transfer doesn't work for several minutes, sometimes, you just get to transfer a few kb within a few minutes if you're lucky. This is within the municipal area of San Jose, the 3rd most poulous city in California.

I have drawn up the approximate area affected in Google Maps:

https://goo.gl/A6pJXl

This is substandard service from Verizon. I would appreciate any advice on how to file a proper complaint with Verizon and whether things like this are also appropriate for a formal complaint to FCC.