IOS – Change iMessage account on iPad

How does an iPhone send iMessages to iPad:

1. Make sure iMessage is set "on" on both devices
2. On your iPhone, go to Contacts and find your friend's name to check whether or not you have his email address. If not, you need to add his email address.
3. On the iPad, go to settings>>messages>>recieve at>>add email. Put your friend's email address from step 2. It will say "verify".
4. Your friend need to verify by checking his email. There'll be an email from Apple. Open the email and he'll be asked to click on the verify link. Click on it and he'll be directed to Apple's homepage. Just follow the instructions there.
5. Once your friend has verified his email address, the word "verify" in step 3 disappears. Now you can iMessage him.
6. On your iPhone, go to contacts and choose your friend's name. Click on "send message" and choose the email address that was just verified. You're now directed to the message screen.
7. In the "To" field, you 'll see that the email adress is missing "@". Ignore it.
8. Make sure that the send button is blue. Now just type your message and send.

Hope this works!

You can remove your phone number from Messages on your Mac and iPad. On your Mac, go to Messages > Settings > Accounts. Select your account. Uncheck the box corresponding to your phone number. On your iPad, go to Settings > Messages > Send & Receive. Uncheck your phone number.

You cannot remove your phone number from receiving messages on your iPhone, because this is also where your text messages come in. However, you can set your email address as the default. This will guarantee that all new messages sent from you will show your email, and all responses will come back that way. Go to Settings > Messages. Select to "Start new conversations from" your email. I hope this helps.