For Seniors: Set Up an iMessage Account on Your iPhone 4S
iMessage is a feature of the iPhone 4S available through the preinstalled Messages app for instant messaging (IM). IM involves sending a text message to somebody’s iPhone (using her phone number) or iPod touch or iPad (using her e-mail address) to carry on an instant conversation.
Instant messaging differs from e-mail or tweeting in an important way. Where you might e-mail somebody and wait days or weeks before that person responds, or you might post a tweet that could sit there awhile before anybody views it, with instant messaging communication happens immediately.
You send an IM, and it appears on somebody’s iPhone, iPod touch, or iPad right away — and assuming the person wants to participate in a live conversation, the chat begins immediately, allowing a back-and-forth dialog in real time.
To set up iMessage, tap Settings on the Home screen.
Tap Messages, and the settings shown here are displayed.
If iMessage isn't set to On, tap the On/Off button to turn it on.
Check to be sure the e-mail account associated with your iPhone under the Receive At setting is correct. (This should be set up automatically based on your Apple ID.)
To allow a notice to be sent when you’ve read somebody’s messages, tap the On/Off button for Send Read Receipts.
6.Tap the Home button to leave the settings.
To change the e-mail account used by iMessage, tap Receive At, tap the e-mail address, and then tap Remove This Email; then follow the preceding steps to add another e-mail account.