I’m having the same problem and I think I found the source. My ISP resets my modem every night. For whatever reason they feel it’s necessary to reset my modem, my doorbell doesn’t reconnect. I have NO idea why they do this, nor why this idiotic doorbell won’t re-establish a connection. So, every morning I have to remove it, push the orange button on the back, go through all the crap to get it to reconnect and mount back on the wall. I think I’m going to go buy a $10 doorbell from Home Depot and throw this in the trash like I should have years ago.