Yealink IP Phone Unable to Factory Reset ~ Lost Admin Password ~ USB Firmware Recovery Mode SIP-T42S
#Yealink #Phone #Unable #Factory #Reset #Lost #Admin
“DrShock”
In this video we go over how to unlock a Yealink SIP phone which has an unknown administrative password applied thus preventing a successful factory reset. We will show how to get past this problem by putting the phone into a factory firmware recovery mode and upgrading the firmware via a USB…
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