Specifically for the t42s but I’ve noticed that at least a few other models have outdated firmware as well. I bought a couple of t42s phones with the hope of getting them on the wifi at a customer that has no structured wiring. What I’ve learned so far is this for the t42s model:
-The latest level in EPM (labeled 1.17) 66.81.0.70 does not support wifi
-The level that came loaded on the phone i just bought 66.82.0.30 does work
-I was told on the Yealink forum that everything as of 66.83.0.10 does work for the t42s but as pointed out above this isn’t quite accurate.
-The latest level on the Yealink site is 66.83.0.50
Beware of yealink V83 firmware if you are using openvpn to connect the phone to a VPN server.
That’s broken.
There is also another BLF issue that’s been discussed in this forum.
Do you have a link to these discussions? On the v82 firmware that my t42s is currently running the BLFs seem to work just fine but I haven’t tried the VPN.