We had a new HVAC system installed the T-Stat wasold so it was replaced also with a Honeywell T6 pro. I set it up and found that if you follow the instructions you will not have any problems. I installed the Honeywell Home app on my phone , now I can open the app and can make any changes I need.
A very easy product to use. Initial programming is easier with an Apple smart phone than android, but once programmed it works flawlessly with an android. The T 6 has all the features I need to manage my home.