After damaging the screen on my Samsung Galaxy, I recently purchased a used Motorola Droid RAZR through Amazon. The phone appeared to be in great condition. At a Verizon store, a tech person put SIM card from the Samsung into the Droid. After activating, texting and data worked fine, but I am unable to receive or make calls. Verizon store told me the phone likely had a "radio issue," and said I should buy from another used vendor. I didn't want to give up just yet so I called Verizon 611 support. They attempted to reconnect me to the network and tower, but this did not work. I also tried to reinsert the SIM card, reboot, restore factory settings. A few things I noticed: -When I called Verizon 611 support, they thought I was calling from a number I did not recognize. The phone number from my previous phone appears as expected under Status > My phone number, but for some reason Verizon sees someone else's number when I call. -Under Status > Network I see Unknown. -The Verizon tech person said the IMEI and ICCID were appearing as expected. -Under Mobile Network settings, Network operators is greyed out. -After phone powers up, I see Preparing SD Card. Then this message disappears. Can anyone point me in the right direction? I'm unsure if this is related to a phone setting, hardware, SIM card, Verizon setup issue, etc. Thanks!