1. Log into Yeastar and check if there is already a new firmware version
If there is a new firmware the Download it and update the phones
If not
Go To the phone brands firmware section and download the firmware required
Back to the Yeastar
Auto Provisioning /Resource Repository/Device Firmware
Add you new firmware and fill out the details ( Unzip the downloaded file first)
Select your phone and click on firmware Upgrade
You will see the new file is available
The Phone will now upgrade