How to make up the mobile phone number three years ago?

You can try to retrieve your mobile phone number three years ago in the following ways:

1.** Find an old mobile phone * *: If you still have your old mobile phone, you can try to open the phone address book or SMS record to see if you can find the relevant mobile phone number.

2.** Find old bills or contracts * *: If you have signed a contract with the operator or received bills, you can try to find old bills or contracts, which may contain relevant mobile phone number information.

3.** Contact the operator's customer service * *: You can contact the operator's customer service at that time and provide relevant personal information. They may help you find your mobile phone number.

4.** Inquire about relevant email or social media accounts * *: If you have bound your mobile phone number to an email or social media account, you can try to inquire about relevant account settings to see if you can find your mobile phone number.

5.** Reissue the SIM card * *: If the mobile phone number cannot be retrieved by the above methods, you can consider reissuing the SIM card. It is necessary to confirm whether the card sleeve is carried with you before reissue. If the card holder has been lost, you can bring the original and copy of your ID card to the business hall of the corresponding operator for replacement. You need to provide the identity certificate corresponding to the mobile phone card when you log in.

It should be noted that the above methods do not guarantee the successful retrieval of the mobile phone number, and the specific situation needs to be decided according to your personal situation and local laws and regulations. The above contents are for reference only. If in doubt, please consult a professional legal person or operator's customer service.