Principles :-There are some principles which you should follow
01 :- The First Principle: It is not other people’s responsibility to cope with your mobile phone use; it is your responsibility to use your mobile phone inoffensively. Please note that “inoffensively” is not defined by what you expect others to tolerate, but by what others do in fact find offensive. Ignore this principle, and you are sure to be rude.
02:- Stay away from others while talking on the phone. If possible, keep a 10-foot (3 meter) distance between you and anyone else whenever you talk on your phone. Most people do not want to hear what you’re talking about.
03:- Don’t talk too loudly. Generally you don’t have to shout in the microphone to be heard on the other end. In fact, doing so often makes it harder for you to be understood. In addition, shouting on the phone disrupts people around you.
04:- Don’t put your phone on speaker. Just as many people do not want to hear your end of the conversation, they don’t want to hear the other person’s either.
05:- Do not talk about personal details in public. Personal is just that: personal. If callers want to talk about personal details, tell them that you will call them back later, move someplace where you can have a little privacy, or switch to text messaging.