If the phone isn't waterproof then probably the phone is junk. Not sure if the Simcard is readable. Recently replaced the battery in my iphone and it isn't a very easy task. Need a small plastic pry tool and suction cup to pop the front off. Should be some youtube videos on taking particular models apart.

Found a phone last spring when water hunting in one of the local ponts and it wouldn't take a charge. Maybe I'll pop it a part and let you know.