Xi6 flex shows xre-00250 after visit to xfinity store to return gateway and remove voice

@user_87u1ge Our team is here to help. I'm sorry to hear you're having an issue with your cable box.

I am happy to help with your device issue. Can you please direct message me your first and last name along with your full service address, so I can assist you further?
To do so, click on the chat icon located at the top right of this forum's page.
Here are the detailed steps to direct message us:
• Click "Sign In" if necessary
• Click the "Direct Message” icon (upper right corner of this page)
• Click the "Start new conversation" (pencil and paper) icon
• Type "Xfinity Support" in the "to" line and select "Xfinity Support" from the drop-down list
• Type your message in the text area near the bottom of the window
• Press Enter to send your message