In the parlance of the ever polite etiquette-expert world, "suggestions" is about as strong a word that's used. It's impolite, after all, to tell someone they are doing something wrong, she suggests.
The tips listed below were originally written for Sprint PCS customers.
Let voice mail take calls when you're in meetings, restaurants, courtrooms or other busy areas.
Speak in a regular conversational tone.
Use the vibrate function or turn off phones in public places.
If you are expecting a call that can't be postponed, alert your companions ahead of time.
Consider using two-way messaging or short messaging services when you are with others.
Use discretion when discussing private matters or certain business topics.
The people you are with should always take precedence over the call.
If you are put off by a cell phone user, alert a maitre d' or another authority figure. Don't take matters into your own hands.