Does iPhone's imessage work overseas?

I'm going to India over the summer, and i was wondering if i can still contact a few of my friends in the US I have a 3G iphone, and the place where i'm residing in India has internet.

Yes as long as you are connected to the internet

As long as there's some sort of internet connection there, yes you can

Yes, imessage is also free even exchanging internationally.

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