Yealink Forums

hello
i have 25 phone with firmware: 21.70.18.1
hardware: 17.0.0.36
i try to upgrade to 34.71.0.90 or 34.72.0.20 or 34.71.0.76 but is dont work .
its tell me the opretion is sucess but dont realy upgrade.
do you have any idea how to help me.

tanks you and sorry for the eng.

The 21.70.18.1 version is a special version.
You can't upgrade this version to global version.

(05-05-2016 05:53 AM)Yealink_Karl Wrote: [ -> ]The 21.70.18.1 version is a special version.
You can't upgrade this version to global version.

So what i can do to put vpn fille in thé phones ?
And did you havé à version that i can update.