To switch between SMS and IM:
- Open the message app by going to the Home screen and tapping [icon-launcher-messaging] to see the conversations. You see all your conversations with a friend - sent and received; SMS and IM.
- Open any conversation
- Tapping on 'Change Type' lets you switch between SMS and IM.
- Tapping the text field (where the screen says 'Hi') brings up the keyboard for you to type your message.
- As soon as you start typing, 'Type' changes to 'Send' so when you finish typing you can tap 'Send' to send your message.