The first number in the IP rating determines dust resistance on a scale from zero to six. The iPhone 15's rating of 6 ...

One of the marquee features for Apple Intelligence has been missing from the iPhone 15 Pro and iPhone 15 Pro Max — until now.

IP ratings indicate a phone's level of resistance to dust and water. Phones without an official IP rating may still have some water resistance features, but it's best to avoid fully submerging them.