I just provisioned a brand new certificated SPA525G phone yesterday. It provisioned without a hitch. All outbound calls end up with a reboot. This includes VM, The only calls to not reboot so far are to our ATT cell phones. Our service is ATT through UVerse modem/router. I opened case number 07551782 and received a technical document with no assistance on what to look for and how. Very frustrated. I should share that prior to removing my previous Polycom SP321 I had no reboot issues.