WOTC - Call center

I asked this question in the Wisdom of the Crowd:

How can the call centers improve the customer service?

Here are the responses: (48 Votes)

63 % - Allow the customer to talk to a call center staff promptly.
17 % - Do not give advertisements and promotions in the automated messages
15 % - Allow customers to request for a call back.
6 % - Do not ask customers to enter NRIC or other credentials.

See the pie chart at: 
http://www.wisdomofthecrowd.sg/chart.aspx?ID=887