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8x8 Support

Recommended Firmware for Yealink T4x Series


Due to high risk of possible firmware update failure, we do not 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 Yealink devices purchased directly from 8x8.


Firmware is X.80.0.147 for:

Yealink    SIP-T41P/G    Firmware
Yealink    SIP-T42G        Firmware
Yealink    SIP-T46G        Firmware
Yealink    SIP-T48G        Firmware

Firmware is for:

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

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.

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.