Here I can just have the manufacturer give instructions, call customers, the 2 hands on the measuring instruments, or typing a report, write, and despite the surrounding noise (compressors, fans, motors, wind ...) the interlocutors do not complain and I get to hear them perfectly.
Phone is no longer an obstacle when you need both hands.
Plus, I have my 2 phones connected (pro and personal) and when I have a doubt, a single tap lets me know that the phones are connected, and that I have not left behind ...