How to factory default desk phones
Please press the settings button (The cog icon) on the bottom left of the phone.
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Next, press the option for advanced settings on the bottom of the screen.
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Once the phone has started the procedure, it will restart a few times, before booting back up.
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When prompted, please enter the code 258046 and press the enter key. If 258046 does not work, please try 22222 instead.
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