Yealink Phones - Web UI Admin Password Reset

How to reset a lost Web UI Admin Password on a Yealink Open SIP Phone without having to Factory Reset the Device or Know the Current Admin Password.

See here for more info:

Contents of the CFG text file:
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#!version:1.0.0.1

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Table of Contents:

00:00 - Introduction
00:27 - Create a CFG file
01:04 - Copy the CFG file to an HTTP Server
01:20 - Create a new DSS Key on the Phone
02:49 - Use the New DSS Key to Update the URL Field and Download the CFG File
03:51 - Verify the CFG File was Downloaded and the Password was Reset in the Web UI
04:17 - Contact The IVR Voice
04:29 - Contact TeleDynamics

Voiceover: Allison Smith of The IVR Voice