By the time you have finished drying the iPhone, the SIM should also have dried. Repair the SIM card back into its location and assemble other elements to restart the device. When you reboot the iPhone, you might get to see the low battery icon. Low battery icon clearly suggests that you have to charge the battery of the phone immediately. Nevertheless, if your phone does not operate as of yet, you must let it dry for a couple of days as their may be some traces of water left behind.