In general, phone interviews mean that you'll have several opportunities to impress an interviewer as part of a broader interview process. But, since many others are probably screened on the phone, you can remove your name from your candidate list even if you give a single poor answer to a question.
So, brush up the phone interview etiquette following these tips which perhaps you didn't know before.

Prepare Yourself for Interview
Prepare for the interview a few days before the call just as you will be ready to meet in person. Examine your questions and answers. Wear clothes (don't answer the interview call in pajamas) that will help you to feel confident, skilled and professional when the day comes. Next set up a quiet area where a copy of your cover letter and a resume can be placed at the table.
Most important phone interview etiquette is to make sure you have a piece of paper and a pen, and above all, minimize background noise. Because during your telephonic interview time, you will not want your husband or wife, cats or dogs, and parents or children to yap for the distraction.

Don’t Multitask During Phone Interview
Do not have coffee or the TV on the background during your interview. Don't eat lunch, scan Facebook feed, etc., during your interviews. Actually, you ought not to browse the Internet at all. Although a browser may be useful if you need to look for a quick fact, you should limit it to one window only and print your curriculum vitae and cover letter.

Don’t Put Call on Speaker
The call to the speaker is not a good idea. Although it seems to help you take notes or look at your CV, your interviewer can have difficulty in hearing you and also its’s against the phone interview etiquette. There is a risk of misunderstanding or losing a key static response. If you want to make notes while talking, consider wearing a headset instead.

Make Sure Internet Connection is Working
Do not risk interrupting a defective connection to your interview report. Generally, it would be better than a cell phone if you have a landline at your home. Make sure the service is consistent on your premises when using a cellular phone. Finally, if you call via the Internet, do a test run before your call to someone for the interview.

Speak Accordingly
It is easy to read the body language of your interviewer and to find the way when you should stop talking in a face-to-face interview. These signs aren't so clear on a phone call. It's irrelevant to know whether or not your wandering adds value to the conversation; at some point, your interviewer stops paying attention to you, sees you as someone who is unable to listen properly and may be upset when you take time off to answer more important questions. The phone interview etiquette demands your answer short and strong.