Log in with your administrator credentials (default is admin / admin ). Navigate to > Upgrade .
: Click Upgrade . A confirmation box will appear; click OK . The phone will display "Firmware Updating" and reboot automatically. Method 2: Update via USB Flash Drive yealink t53w firmware upd
The fan in the phone whirred louder. Mark checked his stopwatch. If it stalled for more than five minutes, the unit was toast. Log in with your administrator credentials (default is