Unlock Yealink Phone

I have a Yealink T21P and would like to unlock the advanced settings and the web page for my phone to setup a static IP and work with VLANs. I understand if this may void my warranty or support ability for my phone and am willing to waive my support for my phone (not my base station) in order to unlock it, thus taking full responsibility incase I cause any issues.

What would I need to do in order to get access to the advanced features/web config page for the phone? I have called Ooma support and was told “no” as well as called Yealink and was also told “no”.

Hey - did you ever succeed in unlocking Ooma purchased Yealink hardware??