There are issues with Blue tooth. I had to finally quit using it as conversations were choppy, distorted, others couldn't hear me. I drive a lot and it is very irritating. I also had to give up on visual voicemail. A lot of the issues with rebooting, SIM card not found, etc. ended when I quit using visual voicemail. I hate that I cannot use a Bluetooth headset. I want a new phone but another year before I can upgrade.