Can a water damaged phone be fixed two months later?

In October I completely submerged my Samsung Gravity 3 in water and I took it apart and blow dried it (I know bad idea.) By the end of the day it was turning on but I couldn't get any signal all day. So I used my old phone and every now and then I turn it on and it won't turn on so when I plug it into the charger it says "Samsung Gravity" and starts loading and then it just shuts off and it will keep doing that all day. Is there a way that I could get someone to fix it? Like that guy on TV that says "You break it? We fix it!" Would a new battery work? The square on the phone and battery is red so I know that means water damage. What do I do?