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Up close with iOS 5: iMessage

Thanks to iOS 5, anyone with an iOS device can now easily keep in touch--for free!--by using Apple's new iMessage service, found within the Messages app. iMessage works without any per-message charges from cellular providers or monthly texting plans; instead, you'll send messages over your device's 3G or Wi-Fi connection.

iMessage works with any iOS 5-capable device, sending anything an SMS or MMS can--text, photos, video, contact cards, or map locations. The feature allows iPhone users to talk to iPad users, iPad users to send video to iPod touch users, and so on. You won't be able to use iMessage to contact people with Android devices or BlackBerry phones--that's still the province of text messaging.

iMessage is easy to set up and use: All you need is an Apple ID, and you can start messaging your fellow iOS device users.

Setting Up iMessage

To start using iMessage, open the Settings app and tap the Messages menu. You're prompted to enter your Apple ID--that's the email address you use for buying apps in iTunes and logging in to iCloud. If you don't have one, you'll be prompted to create an account.

If you're setting up iMessage on your iPhone, people who know your mobile number will always be able to use it to message you; you can also supply iMessage with an email address where other iOS device users can reach you. If you're using an iPod touch or iPad, you can message people only by email address, so you'll have to supply one during the setup. You can use any email address you own--such as your iCloud or Gmail account.

Once iMessage has verified your email address, you're brought to the Messages settings screen. Here, you can enable or disable iMessage altogether; turn on Read Receipts, which lets others see when you've read their message; or allow the Messages app to send your text as an SMS if iMessage can't get through. This applies to the iPhone only. Disabling this setting prevents your phone from automatically reverting to SMS--and racking up texting charges--should iMessage fail. It doesn't, however, disable SMS entirely.)

Other settings let you choose the email address or addresses you'd like people to be able to reach you at. (You can associate multiple addresses.) There's also an SMS/MMS section, which allows you to enable or disable MMS Messaging (iPhone only), Group MMS Messaging (iPhone only), Show Subject Field, and Character Count (iPhone only).

Sending Messages

To start writing a new message in iMessage, tap the new message icon in the upper right corner. In the To field, type the email address or iPhone mobile number of the person you want to message. If you've never tried to send a message to this person before, the app will automatically spot-check the address when you finish typing, to ensure that it is iMessage-enabled.

If it is, you'll see the email address, phone number, or (if the address is in your contacts) person's name light up in a blue bubble, acknowledging that you can go ahead and compose your message. In the future, when you type that person's name or email address, you'll see a little blue chat bubble next to it in the drop-down menu, signifying that this contact is iMessage-enabled.

If you've typed in an address or phone number that does not correspond with an iOS device, one of two things will happen, depending on which iOS device you're using. If you're on an iPhone, your outgoing message will change into an SMS (or, if you're messaging a group, a Group MMS), and your contact's name will highlight in green. If you're using one of Apple's other iOS devices--an iPod touch or an iPad--your contact's name will light up in red with an exclamation point next to it, and you won't be able to send anything. When you get into a conversation with someone on an iPhone, you'll be able to tell whether it's an SMS/MMS or iMessage conversation by the color of your chat bubbles; green for SMS, blue for iMessage. On other iOS devices, the chat bubbles will stay a lovely shade of blue at all times.

Like MMS messages, you can send text, photos, video, contact cards, and map locations to a fellow iMessage contact. You can also carry on chats with a group--though be aware that you'll need all your group members to use iOS devices; otherwise, you'll fall back to an MMS message (on an iPhone), or the chat will fail.

iMessage Quirks

iMessage offers a few neat extras for users: If you enable the Read Receipts feature, your contacts will be able to see when you've read their messages; and if you're carrying on a lengthy conversation, you'll be able to see when your friend is typing, and vice versa, thanks to a gray "thinking" bubble.

The iMessage app also offers a bit of animation: If you want to consult a point earlier in the conversation but you have the keyboard open, you can just scroll upward; the keyboard will intelligently slide down into the bottom of the screen.

Because iMessage uses 3G and Wi-Fi to transmit its messages, it's occasionally not the most reliable to use on an iPhone in the case of a natural disaster or 3G outage. This is where the Send As SMS toggle comes into play: If you have this option enabled, you'll be prompted to send your message as a traditional SMS instead in the event that the iMessage app can't transmit something over a data network.

Serenity Caldwell is a staff editor for Macworld.


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