Can I bring an iPhone from USA to India?

My relatives can bring me an iPhone from USA this winters so my question is that if they get me an iPhone from USA and I unlock it unofficialy will it be any problem from them in USA

No, Unlocking phones are now legal. You can't get any problem to unlock your iPhone. And you can unlock your iPhone from Network lock safe and securely using Remote unlocking method from the site http://www.wickedunlock.com/apple-iphone/rs16wp9/

You are unlock your phone and use normally. No any problem unlock your phone officially or unofficially.use it and enjoy with after unlock iPhone.