Eli5: How are phones waterproof even though the charging port terminals can be exposed to water and not short circuit them?

Question

Eli5: How are phones waterproof even though the charging port terminals can be exposed to water and not short circuit them?

In: 4320

Answer 1

There is no insulation in the connector, water will prevent the ports from working and if you keep trying to charge it when wet, voltage and water working together will quickly corrode the contact pins.

However it is still water resistant by mechanically sealing the whole connector and in fact any holes and cracks for buttons, speakers and the screen, preventing any further liquid ingress into the phone.