YSK your USB cable can be used to hack into your phone/computer
Why YSK:
It can be a security risk for your phone or computer or any other device you connect the malicious USB cable to.
These cables can actually contains a tiny computer.
So don't borrow or buy cables from people or sellers that you cant trust.
These cables look identical to a regular USB cable.
The hacker can for example create a WIFI network.
Access files on your phone/computer.
Create sync accounts. For example iCloud.
Give full keyboard access.
Send SMS messages.
Share your whole hard drives over the network.
Run scripts.
Turn on your webcam and take photos.
Run a keylogger.
And the list goes on. The attacker can do pretty much anything with your device.
Here's a image of such cable and the tiny computer:
https://i.imgur.com/ZbCTF2S.jpg