Hacking bluetooth channels is a common form of invasion hackers use to invade your privacy. Oftentimes, iPhones' and Androids' bluetooth is on by default and, although that may save you a tap of the finger, it can also be a safety issue.
"Via bluetooth channel hackers could mask a malicious device and try to make it seem like a legitimate device so that you connect your phone with it," Somdip Dey, an artificial intelligence scientist at the University of Essex and Samsung R&D Institute UK, told Business Insider.
Also, be sure to double-check which devices you are connecting to, especially when it is not your own bluetooth or it's your first time connecting.
"Once the hacker gets access to your phone through the malicious device, the hacker could exploit several other security breaches through it," Dey said.