Why, according to golf etiquette, is it forbidden to use a cell phone on the golf course?
Golf and the successful execution of a golf shot require maximum concentration and good mental skills. The ringing of a cell phone or the phone call of a fellow player would negatively affect concentration during the shot. Any distraction caused by a cell phone or other noises will interfere with a golfer's concentration during a golf swing.
Using a cell phone or talking on the golf course should therefore be avoided. You will also find that talking on the phone on the golf course not only disturbs your fellow players, but also affects your own concentration. At golf tournaments, using a cell phone on the golf course is not just a breach of etiquette, but a serious breach of the rules that can result in penalties or even disqualification. A phone call could be used, for example, to obtain unauthorized tips during a round of golf or to be instructed about rules and etiquette. Ultimately, it is therefore better to switch off your cell phone when playing golf and stow it in your golf bag.