I have several honeywell thermostats. They use the TCC app which is not compatible with this thermostat. This uses a different app. I also had to call tech support because mobile data has to be turned off for android phones not noted in instruction
the equipment works well and we now enjoy all the features it has to offer. the main issue is we had a horrible time linking the thermostats with our phones. the contractor didn't have the proper knowledge and the call in help was insufficient.