iMessage texting the US
I have a Canadian account and was wondering:
Can I use iMessage to send texts to my daugher who lives in the US for free; she has a 3GS. If I use iMessage to send a text while I am in the US to anyone in the world who has an iphone (eg., my wife who is in the States with me), ipad or mac computer and am I using data (3G with roaming charges or wifi) to do so?
GH