Below are some of the quickest solutions that have been found for issues with the Zen phones:

Error

• Data Initializing
  • Take out the battery and place back in.
• No Line Connected
  • Unplug the base station for 10 seconds
• Provision failed.
  • Reset the phone with the below guide
  • Zen Telephone - Yealink Handset Reset | Knowledge Base | Brandon Trust

The phone is not working - check the following things:

• Ensure that the ethernet cable is plugged into the FON port on the router.  It should not be plugged into any of the LAN ports.
• Reset the router.
• If the number is being ported, may need to wait 24 hours if the existing phone has gone dead.
• Check that the router has internet - the phone runs through the internet.