You can also upgrade your phone to UCS 4.0.7 using Online upgrader (Polycom Hosted Server)
NOTE: Please be aware that the Thawe MD5 certificates have been replaced with SHA1!
Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge. If you need immediate and/or official assistance please open a service ticket through your proper support channels. Please also ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's