Why do I buy something on someone else's mobile phone, and the recipient's phone is my own, but I can't receive the text message?

One possibility is that the other party didn't send you a text message, or the phone was intercepted.

General express messages are sent by the background system. For example, courier brother scans with his code scanner, and messages are automatically generated and sent in the background. If the mobile phone is set with anti-harassment, the message will be intercepted, and naturally he will think that he has not received the message.

At present, the business of sending and receiving express delivery is busy, and many express delivery companies will cooperate with third parties, so it may be the third party that sends the goods. In this case, you can call the express customer service and ask about the express delivery.