We still use a landline. After Sandy the cell phones didn’t work as the towers were down. Thanks to the “ancient” copper wire line phone we insist on keeping we had perfect landline service!
At least once a year I have to argue with Verizon that I don’t want to switch to digital service for just this reason. When we needed repairs a couple of years ago on the lines (animals chew on them) they twice sent someone to instead switch our service and we refused.