1. Low battery: If the phone battery is low, the caller ID may be abnormal. Please replace the battery with a new one, and then check whether the problem is solved.
2. Extension problem: If there is something wrong with the extension, it may also lead to incomplete caller ID. If the problem still exists after changing the phone to a neighbor's house, it may be a problem with the line or virtual network. In this case, you can contact the person who handles the virtual network to check whether the data of the virtual network is complete.
The above information is for reference only. If the problem still exists, it is recommended that you consult the brand after-sales service center or find professionals to help repair it.