Kwebbl - Firmware update Yealink T4-U Series – Maintenance details

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JUL16

Firmware update Yealink T4-U Series

CompletedJuly 16, 2026 at 5:00 PM – July 17, 2026 at 5:00 AMUTC

Affects

PBX

Under maintenance from 5:00 PM to 5:00 AM

Provisioning

Under maintenance from 5:00 PM to 5:00 AM

  • CompletedJuly 17, 2026 at 5:00 AMUTC
    Maintenance has completed successfully
  • In progressJuly 16, 2026 at 5:00 PMUTC
    Maintenance is now in progress
  • PlannedJuly 09, 2026 at 1:31 PMUTC

    Please be advised that Kwebbl Smart Cloud Communications will update the firmware of several Yealink devices in our Auto Provisioning to version 87. Please note that the device will update its firmware automatically after it will become available within 12 hours in the auto provisioning. 

    Devices:

    • Yealink SIP-T41U

    • Yealink SIP-T42U

    • Yealink SIP-T43U

    • Yealink SIP-T44U

    • Yealink SIP-T46U

    • Yealink SIP-T48U

    The new firmware will become available on Thursday 16-07-2026 19:00 CEST. The devices are expected to upgrade within 12 hours according to the provisioning cycle.