Today I received EXCELLENT technical support from US Mobile support rep IMRAN (and received the same very high level of support from Hina Shah, last week). I have an iPhone7, which is old enough to cause a few complications. For example, it's not compatible with the US Mobile black SIM for Verizon cell towers; instead I must use the white SIM for T-Mobile towers (lesser coverage). And there are other limitations too, due to the age of my phone. Despite that, US Mobile has ALWAYS been very willing to assist me, and today IMRAN patiently and professionally guided me through trouble shooting procedures that seem to have resolved the problem. I've been with US Mobile for more than two years now. Several "discount" cell service providers have joined the market during that time. I can't comment on the quality of their service compared to US Mobile, but their prices are not as good. And frankly, US Mobile was offering HONEST, AFFORDABLE cell phone service years before those recent competitors appeared. I have ZERO complaints about US Mobile, and have referred friends to them. My friends are very happy with the service and savings, and I intend to remain a US Mobile customer always. It's startling to realize just how crucial reliable cell phone service has become in our lives (yikes)... Thanks to US Mobile for exceptional Technical Support, and thanks to IMRAN for his time, expertise and willingness to assist me.