Iphone messages being sent as both imessage and regular textings
Hello, so I upgraded my phone to an iphone 13. And for some reason, my texts keep going back and forth between Imessage and regular messaging. And my friend (who also has an iphone) says it is popping up as two different conversations, one being my number and the other popping up as my email. How do I just remove the email for him to only recieve texts from my number?
iPhone 13 Pro Max, iOS 15