Dropped iPhone in the toilet? - 1

Earlier I dropped my iPhone 3GS in the toilet, it was in there probably for 8 seconds when i took it out and dried it with a towel. I checked to see if it worked, and it allowed me to text. But when I had someone call me, the sound didn't work. I then proceeded to put the phone in rice. But now, the circle button at the bottom doesn't work, so I'm stuck on the messaging screen and can't leave it. Also, the "Voice Memo" screen keeps popping up as well as the "Unable to Charge with this Charging Device" screen, even though I'm not trying to charger it.
I have had this phone for over two year and my contract is up, so I'm due for a new phone.
But am I going to have to pay full price for the 4s or will I get some kind of discount since my contract is up?
I don't want to spend more than $100 on an iPhone because the new one is supposedly coming out.

They'll give you a discount

The contract is for iphone 3gs only not for 4s so very difficult and you can use your old iphone just go to repair shop they will repair your mobile

Put it in a baggie of rice and replace with new every dy that will prob help