I just got the RCT715. I charged the unit for over an hour last night, but didn't get it to fully charged state. This morning, I downloaded the Varia app to my iPhone 8. I've managed to get the RCT715 paired with the app, and added the sensor to my Edge 1030.
Now I'm attempting to get the firmware updated to 4.40 from 4.10. It has already been "in progress" for over 20 minutes. Will it ever complete?