There is nothing wrong with my internet service as it's thru the cable company, not Verizon.  The network extender does work via the internet connection to boost cell phone reception.  Theoretically.  Anyway, the booster is only as good as the signal it gets.  In other words, it can't boost something that's not there.  No cell tower coverage = no signal = nothing to boost.   Verizon has assured us, many, many times, that the extender is working just fine.  As do our phones. 

So, what do you think the problem is, hmm?