The following steps will walk you through factory resetting a Yealink T4x phone.
Depending on your phone model your screen may look different than the one shown here, but the steps are the same.
Factory resetting a phone will wipe all user information and leave it in a non-working state. You should not factory reset a phone unless instructed to do so by celito support so that we can stage your phone to be automatically configured after factory reset.
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button found in the center of the arrow keys for 5+ seconds.OK