In the first place, when you want to make sure that you are making the right impression, take some time and answer the phone with a smile. It sounds like a simple thing, but the truth is that when you have a smile on your face, even if it isn't a real one, you are going to sound much more positive than you would otherwise. Take some time and consider how you are going to be able to improve your attitude when you are thinking about giving your customers good service. Being positive will help you earn their trust and it can put them in a better mood right away. This is something that can make a huge difference starting from when you first pick up the phone.
Another thing that is going to help when you are thinking about giving good customer service over the phone is the idea of making sure that you are on the customer's side. As soon as you get into a place where you are just trying to get them off the phone, you are going to be conveying that to them and that is not going to make them happy. Go into every call looking into how you are going to make their time a little easier and seeing if you can solve their problem. There are many different options open for you in this case, but remember that ideally, both you and the customer are going to be leaving the call happy.
Make sure that you never lie to the person that you are talking to. Remember that you should call them back if you say that you will; never let them feel as though you simply want to get them off the phone. The more you are able to move forward with this regard, the better off you are going to be. Remember that it is important to be honest with the people on the other end of the line and that this is something that they are going to be appreciating. Consider what your choices are and remember that the more you can deal with them as a real human being, the more receptive they are going to be to what you are suggesting.
At the end of the day, providing good customer service over the phone is just as easy as providing good customer support in real life. You need to think about how you can account for your customers best interests and how you can get the results that they are looking for!