I have the doorbell installed and it is working with the Amcrest SmartHomeApp (version 3.3.2), Blue Iris and Amazon Alexa. I find there is a terrific delay on all 3 applications ranging from 5 to 15 seconds. Also, on the SmartHome App I find that it appears to be using 3G/4G an awful lot of the time. Since my WiFi is quite strong and no other app is trying to use cell data, I don't understand that. I have set the unit to factory defaults twice and this delay and use of 3G/4G still persists. The WiFi signal to the AD110 is around -54dBm (excellent). With this delay, the doorbell is unusable. By the way, none of the other 8 WiFi cameras have a delay over about 0.5 seconds. Where would the delay be in the camera? I have a class 10 16 GB memory card. Does the memory card create a delay???