How can I let two Apple mobile phones text * * *, that is to say, how can I let others text my husband?

You can also receive messages from others to your husband. First, two mobile phones should log in to the same Apple ID, open iMessage, then open the settings of your husband's mobile phone (note that it is not your mobile phone, but your husband's mobile phone), and then open the information.

Then start information forwarding.

After information forwarding is turned on, you can see the mobile phone name (please go to Settings-General-About this machine for the mobile phone name). Turn on the switch at the back, and you can receive the message sent by others to your husband.