You can tell if your iPhone has water damage by removing the SIM tray and looking for a red color inside the SIM card slot. If it is red, it means that the liquid contact indicator (LCI) has been activated and there is water damage. It should appear white or silver if there is no damage. An LCI will activate when it comes in contact with water or a liquid containing water.
The color of the indicator is usually white or silver, but when it comes into contact with water or a liquid containing water, it turns completely red. An LCI does not activate due to changes in humidity and temperature that are within the environmental requirements of the product. In more recent versions, the indicator can be found near the SIM card slot or inside it. You'll find the SIM card slot on the bottom right of the phone.
The indicator itself looks like a small patch. If that patch is white, or white with a pattern, with some iPhone models, then the device has not detected water damage. If the stain has turned red, that's how the phone tells you it believes water damage has occurred. The water damage indicator is a small white tab that turns red when wet enough to damage the device.
If it has turned red, the phone is likely to have a problem. These people feel that if their iPhone falls in a puddle or rains, then the water damage should be obvious, in which case an indicator should be unnecessary. You can tell if your screen has been damaged by water if there are dark lines or spots under the glass. If a liquid damages an iPhone or iPod (for example, coffee or soda), service for damage caused by the liquid is not covered by Apple's One-Year Limited Warranty, but you may have rights under consumer law.
It's phone insurance that covers misadventures, and that's what's probably considered water damage to your iPhone. If your iPhone doesn't turn on after it comes in contact with water, it can be one of two things: the iPhone has shorted out, or water has damaged or corroded some internal components and compromised the circuits. If your iPhone fell into the water and you're wondering what to do, here are the steps you should take to recover from potential damage. However, there is no guarantee that the circuits under the water-damaged iPhone screen will not corrode over time and the screen will stop working.
If your iPhone has been damaged by water or other liquid, then you're not going to like it. The location of the water damage indicator on your iPhone will depend on the generation of the device you have. I just tried to change my iPhone XR, but the store rep said I couldn't find the water damage indicator. Therefore, opening the tray and letting the iPhone dry again will not turn the indicator blank again and will not prevent the phone from being refused repair due to water damage.
It can take weeks or months, but eventually, internal corrosion will cause the water-damaged iPhone to break. However, it should be noted that you will need to look for the water damage indicator before you know if you have received a positive indication. The water resistance of iPhones is intended as an additional measure to protect your iPhone from damage caused by rain, moisture in the air or an accidental fall in a pool or puddle, etc.