IPhone 4 video "call" Info Needed

My boyfriend just bought an IPhone 4. One of the major reasons is that he wants to be able to video call with his dad who also has an IPhone 4.
Problem he is not really tech savvy and I know nothing about video calls or IPhones. (The IPod was a challenge to me! LOL)
How hard / easy is it to video call?
Is anyone willing to give me an idiot's guide to it?
Thanks in advance.

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"Video calls"

what you are referring to is called FaceTime and it is really easy to use.

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Thank you!!!!
Grin Helped much!

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