That evening, Katrina goes to the bathroom and starts to run the bathwater.
When she bends over to test the temperature of the water, the phone in her jacket pocket suddenly falls into the bathtub.
"Oh, no!" Katrina quickly scoops the phone out of the tub, grabbing a towel to wipe the water from the outside.
If the phone isn't waterproof and breaks because of this, she will get into trouble.
Katrina has a feeling that the motherboard is fried, so she doesn't dare turn it off at will. She carefully opens the back cover to check if there's any water in it.
Fortunately, there are no traces of water inside, and it looks completely dry. It doesn't seem to have any problem.
Katrina breathes a long sigh of relief.
Just as she's about to replace the back cover, she notices a small chip attached to the battery.
What's this strange thing?
Katrina looks at it carefully and sees nothing different or wrong with it.
Maybe it's an important part of the cell phone.
