Re: Maps to Compare AT&T, T-Mobile, US Cellular, & Verizon Mobile Coverage and US State of the Mobile Union 1H 2021

sms <[email protected]> asked
> It's always amusing when at a carrier's store 
> they check your home address for coverage then proclaim that their 
> network will work, or not work, for your needs.

I would tend to agree with you that the coverage at your home might not
matter _inside_ the house when you set up the phone for free Wi-Fi calling.

For example, this screenshot taken just now shows a graph of what appears to
be excellent cellular signal strength over time of -90 to -60dBm (RSRP).
 <https://i.postimg.cc/vH0xdT7W/data03.jpg>

If you don't know it, that's damn good signal strength for cellular signal.
But the unique cell id tells me it's actually using the in-home cell tower.

When I unplug the internal cell towers inside my house, the cellular signal
strength immediately drops to a (still respectable) -100 to -90 dBm (RSRP).
 <https://i.postimg.cc/xCbVQ2pj/signal02.jpg> 

All that matters is how close you are to your router when you use the phone
for calling - but - I don't know (nospam might know better than I do?) if
Wi-Fi calling has anything to do with cellular data. I suspect not.

Therefore, if there's no nearby tower, then I think you'd _still_ need a
cellular tower inside your home in order to get cellular data you pay for.

That free cellular tower would most likely be connected to your router, but
if you have "some" cellular signal, a free cellular repeater would work as
well I would think. <https://i.postimg.cc/L8vjbvXD/data01.jpg>

I have all three, but I also have signal outside my house as shown by this
screenshot I took a few minutes ago showing 4G inside & 5G on my balcony.
 <https://i.postimg.cc/pTQNYPQX/data02.jpg>

If my eyes were better, I'd be able to discern the two little up/down arrows
indicating when the cellular appears to be working - but those icons are
just too small to see until they're blown up on my large computer monitor.