Also commonly called a "butt set" for two reasons: the lineman can "butt in" on a conversation, and it often clips to a belt and hangs over the person's rear end. See lineman. The lineman's handset is primarily a telephone that connects via alligator clips rather than a standard RJ-11 telephone plug.
How do you use a phone butt set?
https://www.youtube.com/watch?v=c2n3Eju4NGU
Is putting your phone in your pants bad?
Persons who carry their mobile phones in pockets of their pants are putting their potency at great danger. Scientists say that even in sleep mode, the mobile phone is as harmful as when switched on.4 jun 2016
Is it safe to put your phone in your back pocket?
Unless you wear jeans with flaps that button over the top of your back pocket, then your phone actually isn't very secure. By carrying your phone in your back pocket, you're more likely to break it from sitting on it, dropping it in the toilet or dropping it on the ground and cracking the screen, according to All You.14 oct 2015