To modify the registered mobile phone number for motor vehicles, the owner needs to bring their original ID card to the internet service window of the vehicle management office. Below is relevant information about modifying the registered mobile phone number for motor vehicles: 1. Changing at the vehicle management office: Some owners may have used their motor vehicle registration or driver's license a long time ago, and the registered phone number is no longer in use but hasn't been updated at the vehicle management office. Even if they want to change the information on the 12123 app, they cannot register successfully if the phone number used for registration does not match the previously registered one. 2. Changing on the 12123 app: If you have registered on the Traffic Management 12123 app with the phone number used for your driver's license or vehicle registration, you can directly log in to the app and make changes on the business hall page. Failing to update the registered phone number in time can have some consequences. If the driver's mobile phone number or other information changes and is not updated at the vehicle management office in time, they will not receive SMS reminders, which may lead to overdue renewal or inspection of the driver's license. Exceeding the time limit may result in point deductions, fines, or even revocation of the driver's license, causing inconvenience to daily life and travel.
