You have purchased your New iPad (or iPad 3).
You must be eager to set up and activate iMessage in the New iPad.
iMessage will let your new iPad send and receive SMS-like text messages. It will also enable the sending and receiving of MMS-style multimedia messages just like a phone. Instead of a phone number, however, iMessage uses your email address, and it only works with other Apple devices, like other iPads, iPhones, iPod touches, and the recently released Messages for Mac beta.
Before you can start using messages, and sending texts, photos, videos, voice memos, locations, and contact cards, you need to set it up. Here you need to follow this procedure.
First you should check whether iMessage has already been set. If you set up your new iPad using iCloud, there is a possibility that iMessage will have automatically been turned on and configured for you using your iCloud email address.
You should launch the Messages app. If it works, and you see the screen below, pick a Contact to message and you can are ready to send a message.
Setting up iMessage
If iMessage is not set up already, or if you want to use a different Apple ID (for example, you maybe using a different Apple ID for home or work, or for family and personal, or for iPhone and iPad), you need to set up iMessage.
If you are not having an Apple ID, better get one because you will need an Apple ID to use iMessage. This can be your iCloud ID or your iTunes ID if you have them.
If you want all your devices to get the same iMessages at the same time — i.e. if you want your iPhone, iPad, iPod touch, and or Mac to all show you iMessages from the same account, then you must make sure about logging in with the same Apple ID on all your devices.
If you want to keep each device separate, so friends can choose to iMessage you on your iPhone or iPad, then you should create and login with different Apple IDs on your different devices.
STEP 1 - Launch Settings.
STEP 2 - Tap Messages in the sidebar on the left.
STEP 3 - Toggle iMessage to On. Do this step only if it is not switched on already.
STEP 4 - If you want people to be notified when you have actually seen, not just received their messages, you should toggle Send Read Receipts to On.
STEP 5 - Tap Receive AT if you want to change the email address associated with your iMessage account, or add additional email address to your iMessage account (for example, work and home).
STEP 6 - You will need to Login to the new address, if it is an existing Apple ID. If not, Apple will ask you to register it with them as an Apple ID.
STEP 7 - Toggle Show Subject Field to On if you want to add an email-style subject line to your iMessages.
iMessage is a service run on Apple’s servers. The first time it connects, it needs to activate and register the Apple ID that you are using with the device you are using. The way it does that is by having you login with your Apple ID. If the connection is ever lost for some reason, it may ask you to do it again.
If for some reason it looks like iMessage is stuck on the Activation screen, wait for a few minutes. Then following steps, in the order:
STEP 1 - Turn iMessage off and then turn it on again. Wait a few minutes.
STEP 2 - Turn Airplane mode on and then off again. After this, turn iMessage off and then on again. Wait a few minutes.
STEP 3 - Make sure your iPad is on Wi-Fi. Reboot your iPad, turn iMessage off and then on again. Wait a few minutes.
STEP 4 - Wait and try again later. Apple’s servers can get overwhelmed or experience outages just like anyone else’s
Now iMessage is ready for use in the New iPad. Once iMessage activates, you can send and receive texts and multimedia messages with other Apple users just like SMS and MMS.