Do i need to fix my iphone 4 if it fell into water?

My iphone 4 had fell into water. So i have dryed it from outside and it was working but suddnley stopped. So i had to take out the sim card.
I heared that iphone is water proof, but you must wait 3 days atleast so it would dry out, and it will be normal again.
I tryed to put the charge in it. It worked but they say that i must connect it to itunes i think.
So what you suggest me to do.
Should i take it to a place to fix it?
Or wait till it dry out and work again?
Or whatever?

Well, it might be too late now, but if something like that happens again, immediately shut off the phone, fill a ziploc bag with rice, and put your phone in the bag fully covered by the rice. The rice will draw out all the moisture from the phone within a few hours.

No phone is water proof. Water can destroy electronics, you may be hosed…

Well if you dropped it in water, you can't really expect much, can you?

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