I used Uber from San Diego Airport going to an interview. I was very frustrated because Uber won't work using my Cellular Service! You have to find "hot spot wi-fi" connection otherwise you can't login to UBER! I almost missed my interview due to the poor UBER connection from the airport! The first driver cancelled because we couldn't text each other again due the poor connection. I had to wait for a second driver. Back in Phoenix (from San Diego), I had the same internet issue on my iphone. I gave up requesting the UBER service and took a regular cab! Hence, I agree with other reviewers, the UBER idea is great but execution is miserable!