Iphone ID association problem (I am associated with my classmate’s phone, so he can see text messages and other things. How can I cancel the association?)

It can be achieved, but the following conditions are met: If the message sent to him is sent using a mobile phone number, then the same ID mentioned downstairs cannot be used directly. If the person who sent the message sent your husband's Apple ID, then your mobile phone will also log in to this Apple ID, and the information will be completely synchronized. If the message sent by the other party is to your husband's mobile phone number, then you have to do the following. 1. Make sure that both of your mobile phones are running iOS 8. If not, upgrade. Upgrading using the built-in upgrade function of the mobile phone or using the iTunes function of the computer will not affect the existing data of the mobile phone. Just do not flash the phone. 2. Both mobile phones are set with the same appleid. 3. On the "Settings" - "Message" page, activate the iMessage function on both phones. 4. The two mobile phones must be under the same wifi signal. 5. On the "Settings" - "Message" page, there will be a "Text Message Forwarding" function under the "imessage" function. You use your husband's mobile phone to click in, and then wait for a while, your mobile phone will appear on it, click Bind, a verification code will pop up on your mobile phone, and you enter it on the page of your husband's mobile phone. (Can I see your phone on the "text message forwarding" function on your husband's phone? All the above operations need to be passed. Then the network must be under the same wifi, and it will take some time to recognize it.) This way It is equivalent to sharing information on the same mobile phone. If you want to receive your husband's information, you must be on the same wifi network. Try not to receive information on your mobile phone. In this case, your husband may be harmed due to your operation. Then you can still see your information. Generally, after the settings are correct, the time between the other party's mobile phone receiving the message and your mobile phone receiving the message is about 10 seconds, including what he sends, you can also see it.