One movement and the coffee is poured out on the mobile phone or the device ends up in the toilet. This is how you can find out if your iPhone has water damage.
It happened quickly – one wrong movement and the phone slipped out of your hand. In the worst case, this ends up in the toilet, bathtub or lake. In addition, it happens again and again that the coffee or the water glass is spilled over a cell phone. Although models such as the iPhone 7 (Plus), iPhone 8 (Plus) and the iPhone X are water-resistant, none of the Apple models are completely waterproof. So it may well be that an iPhone suddenly no longer works as intended after such an unintended dive.
A simple trick that few people know can be used to check whether the cell phone has actually suffered water damage. Because, as Apple describes on its website, iPhones have a hidden sensor that shows whether the device has been damaged by water or not. This is important to know because water damage to Apple devices is not covered by the warranty.
iPhones and most iPods manufactured after 2006 have this water damage sensor. This is called the Liquid Contact Indicator or LCI. On newer iPhone models, this sensor is located in the SIM card slot. To check whether an iPhone has suffered water damage, you must first remove the SIM card tray. With older devices, the sensor can also be located in the headphone socket (see picture).
In its normal state, this sensor is white or silver. However, if the device has been exposed to high levels of moisture, it will turn red. Depending on the location, the sensor can be difficult to see, so Apple recommends using a magnifying glass and a strong light source to inspect it.
To make sure that high humidity or large temperature differences have no influence on the color of the sensor, Apple has tested it extensively. If it is colored red, you can assume with great certainty that the device has been damaged by water.