4G?
I would settle for 3G or even 2G actually working before anyone worries about 4 or 5 or 101g
Round where I live - with a mast in plain sight - no signal. No signal for 95% of the A14 between Cambridge and Norwich, no signal on most of the A1 on the way to London (yes I am often a passenger as well as a driver).
Situation just as shit in other parts of europe... take Germany, was on a call earlier, signal just disappeared, call cut and a minute or so later it was all back again... even when you have a signal it is not reliable