Open iphone 3gs and find serial number and dry out

Question

I briefly dunked my Iphone GS3 Iphone into the dog dish of water. it doesn't boot now. Had no service message . No initials like recognizing my phone.  i had it in dried rice for two days when it finally booted up this far. Do you think there is any hope to keep drying it out. It was only in water a second and i dried to outside off. I had just done cpr on my elderly mother and was nervous when i dunked it in the dog dish. 
I am trying to open up the phone to see the sim card and take it out and the battery to help it dry out. And to talk to Apple Care. They will send me a new phone but haven't told me the cost.  i want a newer IPHONE and have to wait till May 2012 to upgrade per ATT.  My mom has a no contract phone. I am her Power of attorney. i could buy her a phone with her money. Does anyone know if i can put the phone in my name as i am only one who uses a cell phone. I am the caretaker . If i do it this way I would be paying for an att phone that doesn't work.  Am so confused. Don't know how to find serial number. i called apple they set up a call. i gave them the phone number on chat but on the online call back one is requried to insert the serial number of the phone . i can't open it up. is there a video showing how to open the phone.  Any help appreciated. Wet in Iowa. Not in San Diego anymore. Wishing I were home.

Answer 1

You said, "Now how do I get the rest of the sim card out" .... With the SIM Tray out that is everything, SIM Card and Tray.
One of the best ways to dry everything out is to continue what you were doing, let it dry in a bag of uncooked rice for several more days.