Alan is a little league baseball coach and he's trying to create group texts for all parents and players. Everyone gets them except the iPhone users. Leo says that while Apple doesn't support group messaging to Android, Android supports it to iOS. However, there are many different ways to send messages in Android including. If everyone is getting them except one person, it could be that she's got group messaging turned off on her phone, or some setting that blocks it It may be that she disabled receiving MMS because of a flaw that came up last year. She may have forgotten to re-enable it.
Alan is frustrated because he has employees who are so used to using mobile devices, they can't use real computers. There's a disconnect with younger people who can't use them.