I have been having data issues recently. My wireless status will show 3G or 4G but it will be white, not blue. I visited the Gaithersburg store a week or two ago and they claimed that an indication of data access doesn't necessarily need to show blue but that has not seemed to have been the case in my experience. I had them active a new SIM card for me to see if it helped and so far it has not. All day yesterday I saw white 4G connectivity and apps such as FourSquare didn't work. I would get a network connectivity error. Yet navigation worked fine. I dial using Google Voice sometimes and that has been unable to connect too, taking a long time to finally time out and prompt me to use my regular number.
Thank you.