How can I check if my iPhone's Liquid Contact Indicator (LCI) has changed color

1. Locate the LCI: The LCI is typically located in the SIM card slot on the side of the iPhone. You'll need to eject the SIM card tray to access it.

2. Inspect the LCI color: Once you can see the SIM card slot, use a bright light and possibly a magnifying glass to inspect the small LCI dot or indicator.

3. Identify the normal color: The LCI should normally appear white or silver in color when there has been no water exposure.

4. Look for a red color: If the LCI has turned red, this indicates the iPhone has been in contact with water or another liquid.

5. Check for other signs: In addition to the LCI color, look for other visual signs of water damage like corrosion, discoloration, or fogging on the display, camera, or other components.

It's important to note that starting with the iPhone 14 series in the US, the external LCI has been removed. So this method will only work for older iPhone models.

If you do see a red LCI or other signs of water damage, it's recommended to contact Apple or an authorized repair provider as soon as possible, as water damage can worsen over time and is not covered under warranty.