Like rust on a car, it starts to grow slowly over the course of a week, a month, or three months. It will start to spread until one day the Wi-Fi doesn't work, the camera turns off, the phone stops charging, the screen goes black, or some combination of all of those things. The sooner a phone dries, the better chance it has of surviving a dive unscathed, said DryBox president David Naumann. According to his experience, in 36 hours the chances of success are three out of four.
After that, it drops to less than 50%. If you're lucky, it may have been turned off before the water or liquid affected your mobile phone. On the other hand, if you want some heat to expel water that hasn't yet dissipated, consider leaving your phone on a window sill in sunlight or using air inside a can to blow the water out at full speed. Waterproof means that a device is impervious to water for any time, while waterproof means that a given device is rated for exposure to water for a certain period of time and up to a certain depth.
Salts in ocean water are very corrosive to electronic devices and can damage a phone much more quickly. And while some newer phones are water resistant and can withstand a quick drop in a bucket or toilet, none are waterproof. This is the best way to fix a phone that falls into the water without rice (more on that option in a minute), since it can enter the cracks and power ports of the device once it's soaked from absorbing water from the phone. Water resistance only implies that the device can withstand some exposure to water before substantial damage occurs.
A study suggests that 25% of smartphone users have damaged their smartphone with water or some other type of liquid. When your smartphone is wet, water quickly enters the device in a variety of ways and causes serious damage.