I just upgraded my software, my husband did his a week ago. Now I am recieving duplicate texts that are sent to him, but only from people who have other iphones. Does anyone know how to fix this?
You need to use different iCloud email addresses for iMessage. You an use the same iTunes account for apps, but you each need an iCloud account of your own.
Then the next way for this to happen on iMessage is for both of you to be using the same iTunes account for initial setup. The fix is exactly the same. If you create an iCloud account, you can setup iMessage with that account and stop the issue.