Full bars of 5G phone but NO DATA!!!!

iphone 12 Pro Max, zip code 98387, happens all the time, inside or outside my house.

Coverage map shows 5G coverage in my area, I have full bars of 5G, yet my phone cant send a MMS, can't pull up a web page, or do anything data related.  There seems to be about 1000 other posts describing the exact same problem.  What is the fix to this and why has Verizon not fixed this?  

Why would my phone say it has full bars and yet not be usable?  Better yet, why am I paying for 3 lines of service that don't even work at my house?

What is the fix?

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