Regarding this issue, the severity of Amazon's mobile phone number association depends on personal privacy awareness and usage habits. If a user uses a mobile phone number to register and log in on Amazon, and uses the mobile phone number to associate during shopping, evaluation, payment, etc., then Amazon will have more personal information associated with the mobile phone number. This may cause the user's shopping habits, preferences, payment records, etc. to be obtained and analyzed by Amazon, thereby affecting personal privacy.

However, as a world-renowned e-commerce platform, Amazon has corresponding security measures to protect users' personal information. They will take a series of measures to protect users' privacy, including encrypting data, restricting employee access rights, and regularly reviewing security measures. In addition, users can also strengthen the protection of personal information through their own operations, such as setting strong passwords, changing passwords regularly, and being careful not to use Amazon accounts in public places.

In general, Amazon's mobile phone number association may have a certain impact on personal privacy, but as long as users pay attention to the protection and usage habits of personal information, and Amazon strengthens security measures, this impact can be controlled.