system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: how can phones be waterproof when they have so many holes (charging port, headphone jack, etc)?
gpt
Any holes, like the charging port and headphone port are sealed so water cannot get into the body of the phone.  The seals are fairly thin which is why they are only good to about 5 meters, to much pressure will allow water to seep through.