Some iPhone to iPhone texts are blue and some are green
I have a friend who, when he texts some folks with his iPhone to their iPhone, they are all in blue bubbles, yet others are in green bubbles. Such as to me. I have had him power down his phone, check settings for iMessage, SMS & MMS. He has an IPhone 12 with the latest software update. He is on WiFi, as am I, but still we both show green for him. What more can he check?
iPhone 13 Pro, iOS 18