One way to be polite when answering phone calls in public is by lowering your voice. This means speaking softly so as not to disturb others around you. It's important to keep your voice down throughout the call to show respect for the privacy and comfort of those nearby.

Another polite practice is stepping aside when taking calls. This means moving to a less crowded area, or even better, finding a quiet corner or stepping outside. By doing so, you minimize the disruption your call might cause to others nearby, making it a considerate choice.

Keeping phone calls brief while in public is another way to be polite. It's best to limit the duration of your call and focus only on essential communication. If you have to discuss something at length, it's better to postpone it until later. This shows consideration for the shared environment and the comfort of others around you.

Using text messages or emails instead of making voice calls is another polite way to communicate in public. This method is especially useful in quiet or crowded places, as it ensures that your communication is discreet and does not disturb others.