factory restore without admin

[infica]

I need help, i have 4 yealink vp-2009p password protected, I do not know what the password to Unlock it, restore factory need to update the firmware but not how to do it without relying Administrator

i hope you can help me.

[Frank Drews]

Hi,

for some other Yealink phones, you press "OK" for a long time.

yVcP8

[infica]

Hi,

for this specific model not work that method.