If the previous owner of the mobile phone number you purchased has not unbound the relevant account or service, you can consider the following solutions:
1. Use the SMS verification code to see if you can unbind the relevant account.
2. Contact the previous owner: Try to contact the previous owner of the mobile phone number, explain the situation and ask them to unbind the relevant account or service. You can communicate with them through a mobile number or other ***.
3. Contact the relevant service provider: If the former owner cannot be contacted or is unwilling to cooperate, you can directly contact the relevant service provider, such as a bank, social ** platform, email service provider, etc., to explain the situation to them and request to unbind the mobile phone number.
4. Provide proof of identity: When communicating with the service provider, you may need to provide some identification documents to prove that you are the legal holder of your current mobile phone number. This can help them confirm your identity and act accordingly.
5. Change the mobile phone number associated with the account: If you can't unbind the previous owner's account, you can consider linking the relevant account to your other mobile phone number or email address to ensure that you can use these services normally.
6. Wait for a while: Some service providers may set up a buffer for a period of time so that the former owner has the opportunity to unbind the phone number. You can wait a while before trying to contact the service provider.
It's important to note that different service providers may have different unbundling processes and requirements, so it's best to communicate directly with the relevant service provider and follow their guidance when dealing with such issues. At the same time, in order to protect the security of personal information, it is recommended to regularly check and update your account information to ensure that the associated mobile phone number and other information are accurate and up-to-date.