After changing the mobile phone number, the previous mobile phone card was stopped and could not be replaced. How can I check the previous mobile phone card number after changing WeChat?

If you have changed your mobile phone number and can't change your previous mobile phone card, you can check the previous mobile phone card number by the following methods:

Check the old phone address book: If you have inserted the old mobile phone card into other phones and backed up the address book, you can check the old phone number through the address book of other phones.

Check the phone bill: you can log in to the online account of the mobile phone service provider or call the customer service hotline to ask for the phone bill record of the previous mobile phone number. Bill records generally list your phone records and SMS records, including the mobile phone numbers you used.

Check the old SIM card: If you still have a previously used SIM card, you can take it out and check the number on it, but it should be noted that this number may be invalid because you may have replaced a new SIM card.

If you can't find your previous mobile phone number through the above methods, you can try to contact your mobile phone service provider or go to the business hall of the local operator to find out. In addition, if you have bound the mobile phone number in WeChat, you can also try to query the mobile phone number through the account information of WeChat.