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Apple iOS 5 one of the best features is iMessage. it allows the iDevices users to communicae with each other using their Apple ID over 3G or WiFi.

 

What I need to do in-order to activate it?

Nothing, simply nothing all. You can activate iMessage by tap or slide it over to turn iMessage on.

Once activated, there are some new options appearing on the Messages setting screen.

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  • Turn ON the Send Read Receipts to activate read notification. With the Send Read Receipts turned on, the other party in your iMessage conversation will be able to see once you view a message they have sent to you. You will allow the others to be notified when you have read their messages. If you turn it off, the sender will not know whether you have read the sent message or not, but only delivery notification.
  • Turn ON the Send as SMS option to Send as SMS when iMessage service is unavailable. Your device will route a message through your carrier via SMS instead of iMessage when iMessage is unavailable. Of course carrier messaging rates may apply if you are not subscribed to unlimited text plan with your carrier.
  • Received At option lets you configure the address(es) where you would like to receive iMessages.

    In received at settings, you can configure where you can be reached for iMessages at, either phone number, email apple ID, or another email.
    To set up your e-mail address for iMessage, you will need to enter your Apple ID, followed by the e-mail address you would like to use. The email will be verified by Apple and will be added as iMessage. So, when the email activated, other party will identify your email as iMessage-activated users or not.
    If you have several emails to be set as iMessage recipient, add them by tap Add Another Email.

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    In this case, there are multiple email addresses where I can be reached for iMessage at. If a family member contact me to the first email and college buddy contact me to the second email and both of them using iMessage, I will get those message on my iPhone or any other device where this email assigned to.

    Also, you will be able to set the caller ID of for your iMessage identity, either it could be phone number, or the selected email, but it’s preferred to be an e-mail.

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    • Tap on Caller ID to set which address you would like to use as your iMessages identity. If you select unfamiliar called ID (like a new created email), your contacts probably doesn’t recognize the message from you. So, be sure to select a familiar caller ID. Caller ID has to be an e-mail account to make it work.

    However, on the iPod Touch or iPad, you will not be able to set phone number as recipient nor caller id as they have no phone number. So, you will only be able to use your Apple ID as iMessage ID on other device like iPod Touch or iPad.

    Other Settings may not new and you shall familiar with:

    • MMS Messaging: Let you enable/disable to share Multimedia Messaging Service (MMS) through iMessage. Disable this option if you only need texting on iMessage.
    • Show Subject Field: This option will show subject and the content just like sending email. There will be two rows for subject and content while sending iMessage.
    • Character Count: Do you really need it? It’s not the old-SMS style that limit 160 Character/SMS. I prefer to turn it off unless my carrier started to charge iMessage per character.
    • Show preview: You will see the content preview when you have a new iMessage if you enable this option.
    • Repeat alert: Just like SMS tone, will be repeated twice by default. Configure how many repetition you would like to get when a new iMessage notification appears.

    Now you are ready to use your iMessage!!

    Now watch the following videos to see a comparison between both SMS and iMessage and also how to use iMessage: