I have an iPad 3 (retina) and a iPhone 3G. Sending and receiving messages on iPhone but not on iPad how do I sync both up?
On the iPad:
Settings -> General -> Messages
Make sure iMessage is on and is using the address you want (including the phone number of your iPhone) under the Send and Receive option.
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On the iPad:
Settings -> General -> Messages
Make sure iMessage is on and is using the address you want (including the phone number of your iPhone) under the Send and Receive option.