Ok so a few days ago my samsung s4 fell into the toilet. It was still on when I took it out of the water then it turned off but first a screen appeared which said something about either the SD or sim card. I have dried my phone completely and it is not water damaged but every time I press the on button it buzzes, then the samsung screen appears and then it turns off again. This happens over and over again until I take the battery out. So basically my phone is not working and I am stuck on what to do. Please help!