Yealink T26: Firmware Update

If the phone acts up after an update, perform a long-press on the OK button (10 seconds) until it asks to reset to factory settings.

Ensure the firmware version is compatible with your hardware revision. Yealink T26 Firmware Update

Ensure the phone is connected to a reliable power source or PoE (Power over Ethernet). Do not disconnect power during the update. If the phone acts up after an update,