T41P Yealink phone wants to talk to the Verizon mother ship

[nestman]

One of my T22 phones has had a weird static on it for several years now. Upgrading to the latest firmware has not helped. Then recently I found a three used T41P phones at a thrift store. They were $5 each so I bought them all. I figured they would work great to replace the phone with static. However, when I powered it up and it went through its initializing process, it finally gave this error:

"Calling is blocked because there is no address associated with this phone for Emergency Calling. Please update the phone's 911 address on the Verizon MyBusiness website."


How can I wipe/reset this phone so it's no longer looking to talk to the Verizon mother ship and make connection? I need this phone to integrate with my Grandstream IP/PBX like my other T22 phones do.

Thank you!