I can't get USA prepaid data to work. I connected to at&t network, data roaming is turned on. Texting is working. I purchased 500mb data us addion but no internet pages/email work. I'm in Palm Springs and I need data!. Yes I rebooted numerous times. My partner's phone isn't getting data either. We have iPhones 6/7. Is there a toll free number to call? Can I get a refund as this is a waste of my time!