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Knowledge Base & Operational DocumentationWhy Does a VoIP Phone Show the Wrong Extension After a Device Swap?
11/10/2026
A replacement phone can inherit an old profile or register to a different extension than the user expects. Misassigned devices may also expose voicemail or call history.
What to check
Confirm device identity, provisioning profile, extension assignment, user directory, and registration status. Test outbound caller ID and inbound routing after the swap.
Recommended next step
Apply the correct profile and verify access and call paths with the user. Informatix Systems can support business VoIP provisioning and troubleshooting.