You can use the Messaging app to create both text (SMS) and multimedia (MMS) messages. When creating a message, what distinguishes a text message from a multimedia message is that the latter contains an attachment, such as a photo or video clip.
A text message can contain only text and is limited to 160 characters. If a message is longer, it is transmitted as multiple messages but recombined on the recipient’s screen.
1. Tap the Messaging icon at the bottom of the Home screen. (If you’ve removed the Messaging shortcut, tap Apps and then tap Messaging.)
2. A screen showing all stored/ongoing conversations ...