I Have A RTP300 That I use for my routing of Systems only. I have dropped the Vonage over 2 years ago, Due to mistrust in there payment plans And over billing. Would like to know if it's possable to unlock this so I can use it ONLY for Routing. NO PHONE. Current Firmware Ver. 1.00.62. I see there is a upgrade in firmware, but I can not see the the upgrade Firmware tab. And I have done this before. Thanks in Advance.