- The first number in the rating code represents the degree of protection provided against the entry of foreign solid objects, such as fingers or dust.
- An IP code with an “X” in place of the first or second number means that a device hasn’t been tested to protect against the entry of solid objects (the first number) or moisture (the second number).
- For example, the iPhone X and iPhone XR ( $750 at Amazon ) are certified with an IP67 rating, which means that they are fully protected from dust (6) and can also withstand being submerged in 1m (about 3.3 feet) of static water for up to 30 mins (7).
- In some cases, however, a phone rated with IP67 may not have been tested against dust protection levels 1 through 5, or water protection levels 1 through 6.
Read full article: cnet.com