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Recommended Firmware for Yealink T4x Series
8x8 Support

Recommended Firmware for Yealink T4x Series

 

Due to high risk of possible firmware update failure, we do have direct file download available. 

Please reach out to 8x8 Support to request the correct firmware file version for your device.

8x8 is not responsible for any issues or problems it may cause for devices purchased elsewhere.

These are tested for use on 8x8 purchased Yealink devices.

Description 

Firmware is X.80.0.147 for:

Yealink    SIP-T41P/G    Firmware    36.80.0.147
Yealink    SIP-T42G        Firmware    29.80.0.147
Yealink    SIP-T46G        Firmware    28.80.0.147
Yealink    SIP-T48G        Firmware    35.80.0.147

Firmware is 66.81.0.123 for:

Yealink    SIP-T41S       Firmware    66.81.0.123
Yealink    SIP-T42S       Firmware    66.81.0.123
Yealink    SIP-T46S       Firmware    66.81.0.123
Yealink    SIP-T48S       Firmware    66.81.0.123

How to Check current firmware version

  • Check the firmware of the phone by pressing OK.
  • Another way to check the version is via the web GUI by obtaining the IP address from the phone or the Client list table from your router.
    • Log in to the phone's IP address (default user/password: admin/admin).
    • Navigate to Status > Status > Firmware Version.
      Firmware.PNG

Not on the recommended version

If the device is not on the same firmware, either on newer or older; please flash it to the recommended version.

  • Next, go to Settings > Upgrade > Select and Upgrade Firmware.
  • Click Choose File choose the firmware file saved previously, and press Upgrade.
  • The phone will reboot and update it's firmware, once done proceed to the next step.