I am having similar problems. In my situation the ability to get data to/from the car is location dependent. When the car is within about a 2 mile radius of my house I cannot get data to/from the car. When it is in other locations (e.g.where I work which is 5 mies from my house) everything works like it should. There is a coverage map that you can call up on the Audi connect web site. The web site gives you three options; AT&T, T-mobile and e-tron. When you select e-tron is takes you to the AT&T web site even though e-tron connect uses Verizon. Regardless, I have a Verizon cell phone and the reception at my house is better than it is for people who have AT&T or T-Mobile cell phones.
I have been working with Audi customer experience for a couple of months on this. Last week they asked me to take the car to my dealer. The dealer had it for a couple of days and then said Audi is asking them to set up e-tron connect on one of their other cars and see if the problem is with my car or the wireless coverage in my area. I'll post what they find when they get back with me.
I am hoping Audi USA is taking the seriously as they are going to be introducing more e-tron models and wouldn't want to have a reputation for not being able to deliver this service.
6 days of troubleshooting at an Audi dealer with Audi OnLine support. Still no ability to connect to the car through the WEB or the iPHONE App. Apparently Verizon (US-based) provided some indication that a data signal was seen at their end but nevertheless NO current data available on the Web portal or on the APP.
Has anyone had similar issues. Our car is 3 m old and unfortunately i've only had time to manage this now. BUT there appears to be no solution in sight.