I dropped my iPhone in toilet and it turns on but doesn't work?

Its a iPhone 4, anyway I was at the mall and went into the bathroom. I dropped it and then immediatly took it out. I got home and put it in rice for about 4 days. Then I left it on my window to air dry, and haven't used it in like 2 months. I finally tried turning it on today, and it only turns on if I have a charger in it. Once a charger is removed it shuts off. The time and date is incorrect, and it always says I have 100%. Once I plug the charger in it immediatly turns on after the white apple loads it up. Well, nothing seems to work my Wi-Fi won't work? I reset network settings and still nothing. Camera works, and my games but no apps because the internet won't work. The butotn for Wi-Fi is grey and won't even let me turn it on to green. Is my phone done for?

Ewww you picked it up.

Be more careful with the replacement.

Put the battery in a bowl of rice and it will work, but if not buy a new or refurbished model.

Yea, it's done for. For your next phone, buy a protective waterproof case (I recommend Otterbox)
http://www.otterbox.com/