What should I do if iMessage cannot be used after jailbreaking the iPhone 6plus?

If iMessage cannot be used after jailbreaking the iPhone 6plus, you can try reactivating it.

Close iMessage first, and then reactivate it.

The steps are as follows:

Enter settings;

Click Messages;

Put the switch behind iMessage on. If it is If it is turned on, you need to turn it off once, restart the phone, turn it on again, and then check whether the switch behind "Filter unknown senders" is turned on. If it is turned on, iMessage will not be available for contacts who are not on the phone. ;

Check whether the "Send and Receive" address is the mobile phone number plus the Apple ID email address. Of course, the email address can be more.

After confirmation, the system will activate the iMessage function again.