[Note 7 Questions & Answers] Ryland Johnson:
Official IP rating. water table only.....

2nd Digit: Liquid ingress protection[edit]

The second digit indicates the level of protection that the enclosure provides against harmful ingress of water.[1]

Level	Protection against	Effective against	Details

0	None	—	—

1	Dripping water	Dripping water (vertically falling drops) shall have no harmful effect.	Test duration: 10 minutes

Water equivalent to 1 mm rainfall per minute

2	Dripping water when tilted up to 15°	Vertically dripping water shall have no harmful effect when the enclosure is tilted at an angle up to 15° from its normal position.	Test duration: 2.5 minutes for every duration of tilt

Water equivalent to 3 mm rainfall per minute

3	Spraying water	Water falling as a spray at any angle up to 60° from the vertical shall have no harmful effect.	For a Spray Nozzle:

Test duration: 1 minute per square meter for at least 5 minutes[2]

Water volume: 10 litres per minute

Pressure: 50–150 kPa

For an Oscillating Tube:

Test duration: 10 minutes

Water Volume: 0.07 l/min per hole

4	Splashing of water	Water splashing against the enclosure from any direction shall have no harmful effect.	Same as IPX3 Spray Nozzle

5	Water jets	Water projected by a nozzle (6.3 mm) against enclosure from any direction shall have no harmful effects.	Test duration: 1 minute per square meter for at least 3 minutes

Water volume: 12.5 litres per minute

Pressure: 30 kPa at distance of 3 m

6	Powerful water jets	Water projected in powerful jets (12.5 mm nozzle) against the enclosure from any direction shall have no harmful effects.	Test duration: 1 minute per square meter for at least 3 minutes

Water volume: 100 litres per minute

Pressure: 100 kPa at distance of 3 m

6K	Powerful water jets with increased pressure	Water projected in powerful jets (6.3 mm nozzle) against the enclosure from any direction, under elevated pressure, shall have no harmful effects.	Test duration: at least 3 minutes[citation needed]

Water volume: 75 litres per minute

Pressure: 1000 kPa at distance of 3 m

7	Immersion, up to 1 m depth	Ingress of water in harmful quantity shall not be possible when the enclosure is immersed in water under defined conditions of pressure and time (up to 1 m of submersion).	Test duration: 30 minutes[citation needed]

Tested with the lowest point of the enclosure 1000 mm below the surface of the water, or the highest point 150 mm below the surface, whichever is deeper.

8	Immersion, 1 m or more depth	The equipment is suitable for continuous immersion in water under conditions which shall be specified by the manufacturer. However, with certain types of equipment, it can mean that water can enter but only in such a manner that it produces no harmful effects. The test depth and/or duration is expected to be greater than the requirements for IPx7.	Test duration: Agreement with Manufacturer

Depth specified by manufacturer, generally up to 3 m

9K	Powerful high temperature water jets	Protected against close-range high pressure, high temperature spray downs.

Smaller specimens rotate slowly on a turntable, larger specimens are tested freehand for a longer time. Smaller specimens are tested from 4 specific angles.

There are specific requirements for the nozzle used for the testing.

Test duration: 30 seconds in each of 4 angles (2 minutes total)

Water volume: 14–16 litres per minute

Pressure: 8–10 MPa (80–100 bar) at distance of 0.10–0.15 m

Water temperature: 80 °C

End quote.....

As you can see the Note 7 is rated IP68 making the water resistance grade 8 on the table above. Samsung states 1.5m water depth for no longer than 30 minutes.

Please refer to previous posts as this can be very misleading. THE most important factor being static immersion as apposed to movement in water, Movement, even at a few inches depth, adds pressure equal to a greater static depth.

Hope this helps.

Ryland