You can add members to your Talk message by tapping on the three dots in the top-right corner of your Talk screen. Next, look for the “Invite Members” option in the Details screen and tap to continue. You will have the option to select one or more Friends. Tap the “Send Invitation” button to finish.
No, but there’s a reason for that! We don’t want anyone to be able to send annoying messages to an endless list of Jump members. That wouldn’t be fun for anyone! You must be Friends with someone to include them in a Group chat.