Same thing happened to me. I set the new router to have the same SSID/PW as the previous one. A former tenant came by to pick up some of her mail and her phone connected. Since the new router had never seen her phone before, it showed up as an unregi...
Your best bet probably is to switch to wireless. Congestion is a reasonable concern but WHIA is only offered on low-use towers towers. You can get an idea of potential speeds just by running a speedtest on a Telus/Koodo phone. Run a few tests over a ...
You don't need to turn the 5ghz signals off. Try doing a full reset on the doorbell. Press and hold it until it blinks yellow. Will take about a minute.