I asked it a while ago. Network extender is not an option, because it's not only around where I live.
The overall signal reception is very low.
Take a look at this web site and choose 94608 area.
United States Cell Coverage Map - OpenSignal
Also I would like to add several screenshot I made on my Moto-X Android phone.
<Fig.1> At my home

<Fig.2> At an office near Berkeley.
2020 Milvia St
Berkeley, CA 94704-2685

<Fig.3> In Bay street mall, in front of B&N

<Fig. 4> At Emery-go-around station ( Bay Street )

[removed] 94608
So, I collected screenshots I made at a few different street in bay area.
This is not a problem which can be solved by installing a network extender at home.
Sometimes, the opensignal.com page reveals nearby cell towers. I usually see that there is an AT&T tower, but no that for Verizon.
And by looking up Google, I got a feeling that those cell towers were shared by a few service providers, AT&T, Verizon, Sprint, T-mobile to name of the few.
However, interestingly, data network signal has been always strong enough. Probably, Verizon doesn't want to erect another cell tower for better voice network here because probably half of signal can be lost, because the area is near ocean. Anyway the true 4G network ( not the marketing oriented 4G which was deployed many years ago ) will deliver voice signal on data network like provider-supplied-VoIP technically. ( It's the definition of 4G network technically ) So, I believe Verizon somehow care data network more nowadays than voice network. ( Hmmm.. I believe a tower can cover data and voice network.. how come data network signal is always strong enough but not for voice signal? )
After googling, I found out that many people in this area complaint about the voice reception. So, I believe Verizon is going to address this issue any foreseeable future.
My 2 year contract will end next Feb, 2016. is there a way to drop 'voice' part of plan now? I have almost never used voice call after moving in this area. So, approx. 30$ for voice and another $30 for data network is that I have spilt $30 every month on a street.
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