I just got an Ipad2 and can not figure out why I can't send a message to someone who does not have an apple product. I can from my iPhone. When I enter there name it is shown in red with an ! Behind it and the word send does not light up.
You can text this person from your iPhone because you are using SMS over the voice cell network. There is no access to the voice cell network on the iPad, even if you have the WiFi+3G model.
There are some apps, such as TextFree, that will let you do this.
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