Text Messaging on iPhone
Sending and receiving text messages from iPhone is simple, but can seem a bit foreign if you are new to Apple's user-friendly phone. Both SMS and MMS messages go to your Messages inbox, which is the green icon with a white speech bubble (as shown to the right). When a new message is in your inbox, a small red circle will appear in the corner of the icon with the number of messages that you have.
Check Text Messages
Open the Messages inbox by tapping the Messages icon. The inbox lists previews of each text message, in the order they were received. If more than one message is received from the same person, only the most current message will be shown. You would need to open the string of messages from that person to view all the messages sent by them. To open a particular message string, tap the message. New messages will be marked with a blue dot, indicating that they have not been read yet.
Send Text Messages
To send a text message, open your Messages inbox. Press the button in the top right corner that has a square and pencil. This allows you to compose a new message. Start typing the name of the contact you'd like to send a message to or the phone number. Tap in the text field directly above the keyboard to start typing your message. When you are done, press send.
To reply to a text message you've received, open the message string. Tap the text box at the bottom of the message to open the keyboard. Start typing your response. Press send when your message is complete.