mobile phones have IP ratings
Number 5 does not completely prevent the inside of the phone from getting inside, but it does prevent it from interfering to the extent that it interferes with the internal functions. However, the number 6 can fully protect against dust and sand. Sometimes you see phone companies refer to their phones as IPX8. Instead of specifying the dust resistance of their products, they are replaced with “X“. The second number in the IP rating is the water resistance of the device.
He is a little more complicated. Almost all mobile phones have IP ratings starting from 3 to 4. 3, 4 and 4 can protect against water level flooding and will not be damaged even if it gets wet due to rainwater. No. 5 is waterproof to 6.3mm. No. 6 protects against water from 12.5mm. These are just the tip of the iceberg. The real water resistance is 7’s. 7 can protect you even if you fall 1 meter under the water.