Im post this question again. Please, let there be some response

Question

You are employed in the marketing department of The Mobile Phone Network, a retail chain selling mobile phones. The company wants to find out more about its customers. Specifically, the company wants to know about the age groups of mobile phones, who actually buys them, whether they are main for business or personal use and which model and price is most popular.
What I have to do is to create a questionnare. Does anyone have some good questions to be suggested?

Answer 1

You've just listed some in your question above.

1. How old are you?
2. Are you purchasing a phone with or without a qwerty keyboard?
3. Is this phone mainly for business or personal use?
4. What is the maximum you are prepared to pay for a phone?
5. What is the maximum you are prepared to pay for a plan?

Surely, you can think of other questions a company would need to know about to further their business.

Answer 2

Thanks! Ive thought of two of those, but the others will really help. Im sure I can come up with a few other questions.

Answer 3

Are you male or female?

How long have you been using cell phone services?

What features do you look for in your phone? Camera/video capability; texting; gps?? (use your imagination here)