I have never had great service at my home in Lynnwood WA, but I was usually able to get 2-3 bars on my Samsung Galaxy S8 and my wife was able to get the same on her ancient LG Octane.
About a week ago we noticed a serious drop in signal level. I am lucky to get 2 bars on my Samsung and my wife is getting zero to 2 on her phone. We made no changes in our phones or home. Did something happen with the towers in the area?