After changing the mobile phone, Apple 5s received some advertising messages.

Receiving advertising text messages has nothing to do with Apple.

There are two reasons:

1. is your mobile phone number information, which has been sold.

2. You used your Apple ID on a small website, which caused your Apple ID to be leaked. Someone sent you an advertisement in the form of imessage.

The solution is not to fill in your mobile phone number and Apple ID on the website at will.

Block known spam sources.