I am trying to set up Yealink W90B and I can't seem to find the same menu options from step 5 and 6 of the DECT Phones instructions.
https://www.3cx.com/sip-phones/yealink-dect-phones/
from step 5, I don't have “Settings” > “Auto Provision” > “Server URL” to be bale to put the provision URL...