Yealink Handsets on LTE Connections

Problem

• LTE service has intermittant connection. Reconnects and gets different IP
• Online Sip provider registration is not updated with new IP.

Suggestions

Note this is not proven

• On LTE router
  • Configure "unrestricted" APN. (Must be supported by upstream LTE Network Service)
• On Yealink Phone
  • Configure "Account" "Advanced" "Keep Alive Type" "Notify"
  • Configure "Network" "NAT" "ICE" "Active" "Enabled"