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How to change the number left by the social security card after changing the mobile phone number?

Apply for change in the insured unit and handle the change in the social security service window.

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2. Change of social security service window: The insured person can bring his ID card and social security card to the window of the local social security service center to change the mobile phone number of social security registration. It's inconvenient for him, so he can ask his family and friends to do it for him. The agent also needs to bring the original ID card.