Well, yes, Verizon was a PITA, but it worked fine on AT&T (that was back when the techs at AT&T got excited when I showed them the Pro1). My main two problems were that without a headset, calls were almost as loud as a speaker phone so there was little privacy and the fact that for some reason it would not use the car speakers/microphone when connected to BT so I couldn't get hands free. I freely admit I had neither the technical knowledge nor the patience to see if I could work through to a solution to these two problems and these may have been corrected in later stock and/or Lineage