I got my DNA just under a month ago. I started getting a message saying that your device needs a SIM card. I restarted and the message went away until the next day. Called Verizon and found it is a known issue. They offered to replace the phone with a pre-certified phone, but not promises of that resolving the issue. Verizon tech support advised that not every DNA has this issue, and they are working on a software update. HTC advised that the update is available but the carrier is holding it back. I did get the SIM card replaced and have not received the error, but I am still getting the network cut out issue, and calls dropping. Anyone else experiancing this issue??