Solved Update formware on a T42G

[Input IT]

https://www.3cx.com/sip-phones/firmware-update-yealink/ this guide doesnt work as no browser lets you get onto it due to SSL error, firefox gets past login however none of the upload browse button on any page doesnt work

Can anyone advise on how to otherwise update the firmware on a T42G

 

[Input IT]

answered my own Q, type thisisunsafe to bypass the SSL error to proceed to the phone login