You could send SMS on your iPhone 4 to others using the Messages app. If you are having any confusions on sending SMS on iPhone 4, then read this article to clear your doubts. Here are the steps to send SMS on your iPhone 4.
1. Open up the Messages app on your iPhone 4.
2. Now tap on theÂ button.
3. Now enter the phone number or tap the ” + ” button to select a contact.
4. Tap on the message field and type in the message.
5. Tap on Send to send the message.
That’s it! Using this method you could send SMS on your iPhone 4. But do remember about the charges if there are any!