How do I fix a water damaged iPhone?

Make an appointment at the Genius Bar to have it repaired, you have damaged the phone.

Genius Bar Reservation and Apple Support Options - Apple

For the iPhone Service Answer Center click here --> Choose Your Country or Region - Apple Support

Select your country.

For a cost estimate:

- Scroll down to "Get an estimate"

- Enter the service required

- Enter the iPhone model you have

- Enter the version of that model

- Click "Get estimate"

For instructions on how to get your iPhone, iPad, or iPod touch ready for service click here --> Prepare your iPhone or iPad for service - Apple Support

- "To protect your information and save time, follow these steps before you get service for your device."

John Rose6 wrote:

Maybe not unrepairable.

Specs for XR says:

Splash, Water, and Dust Resistant3

• Rated IP67 (maximum depth of 1 meter up to 30 minutes) under IEC standard 60529

iPhone XR - Technical Specifications - Apple Support (CA)

If it was dropped in shallow water (even salt water) for just a few seconds, it should've been okay.

Apple will not repair a liquid damaged phone, nor will any authorized service provider.

If there was no ingress of liquid, then the phone isn’t ‘damaged’.

I agree with lobsterghost1about the corrosive nature of salt water.

I can't find details about the immersion tests but it wouldn't surprise me if it was slowly lowering devices into water and then slowly raising them again. Dropping a device means it is going to hit the water with a degree of force with a dynamic pressure that is higher than test conditions. In addition, the water tightness of a device can diminish as it ages (I bet the XR involved here is not brand new) and I bet the devices tested are brand new.

John Rose6 wrote:

Maybe not unrepairable.

Specs for XR says:

Splash, Water, and Dust Resistant3

• Rated IP67 (maximum depth of 1 meter up to 30 minutes) under IEC standard 60529

iPhone XR - Technical Specifications - Apple Support (CA)

If it was dropped in shallow water (even salt water) for just a few seconds, it should've been okay.

Sorry, but salt water is the worst water a phone can be dropped in. It's highly corrosive. And what you posted is under perfect laboratory conditions, which dropping a phone at the beach in salt water, most definitely is not. And Apple won't try to fix a liquid damaged phone.

The phone is surely a loss and will need to be replaced.

Liquid damage is not repairable. The phone will have to be replaced.

Maybe not unrepairable.

Specs for XR says:

Splash, Water, and Dust Resistant3

• • Rated IP67 (maximum depth of 1 meter up to 30 minutes) under IEC standard 60529

iPhone XR - Technical Specifications - Apple Support (CA)

If it was dropped in shallow water (even salt water) for just a few seconds, it should've been okay.

I found a description of "IP67" on the Web.

• The "6" means "dust tight".
• The "7" means "temporary immersion" – but the tests "are carried out with fresh water" – not salt water. If a device passes immersion tests in fresh water, under controlled conditions, that still doesn't offer a guarantee that the device will be able to survive immersion in salt water, under real-life conditions.