Case Type: market sizing.
Consulting Firm: Dean & Company first round job interview.
Industry Coverage: Telecommunications & Network; Electronics.
Case Interview Question #00156: Your client Verizon Communication Inc. (NYSE:VZ) is a wireless phone service provider that owns and operates the largest mobile telecommunications network in the United States, based on a total of 93.2 million U.S subscribers as of Q3 2010. Verizon wants you to help them estimate the market of 
cell phones. How many cell phones were sold in the United States last year?
Possible Answers:
1. Ask initial questions
To confirm–we are talking about new sales, not total users? And the physical phones, not just changing service plans? Do you mean all types of mobile phones?
