Who I have the same questioned this topic

Starting the middle of last week the cell service dropped.  Location is on Oakland Road and cross street is Main street in Sharon, MA. Service is poor inside and out.  One bar to no service.  Tablet shows -112 db.  Phone showed -109db.  Another phone showed one bar to no service.  Picked up a new iPhone SE 2020 yesterday and have same problem.  On rare occasions it goes to two bars but won't hold connections.  WIFI cellular won't hold as when it sees the cell signal momentarily it drops.  Tried to talk to tech service but couldn't hold connection and when called on landline they clicked off.  Previously had good service.