How To Add Someone To A Text Message Thread On Iphone. Tap the top of the message thread. Find and long press the text message (not the contact icon) from the person or group you'd like to pin.
Note that this will work for group imessage conversations. Open the messages app > tap on the message thread of the person you want to send an animoji to, or create a new message > select the animoji/memoji icon in the bar above the keyboard (memoji with. Open the conversation and tap details and scroll to add contact.