I'm slightly apprehensive, but had the SIM card error 3 times in one day, once while on an important call for work. Just heard a pop, and no voice, saw the nice little icon on the notification area, and that was about it for me. I also had an issue with hearing the "Standard 3," or whatever it's called, ringtone from my earpiece. Apparently, that is also a known issue with this phone. The ringing wouldn't go away until I restarted the phone. I did try a hard reset and this did not help the problem. I am only upset that the phone is approx 30 days old and have to get a CLNR. It should be here Monday. Anyone had any luck so far with them?