How can I change my mobile phone number?

I recently bought a contract phone on Orange. I want to change the number to my existing O2 number. How do I go about this?How can I change my mobile phone number?
Unlcok the phone and use your old sim card

go to the O2 shop in town

xHow can I change my mobile phone number?
you have to use a differnt sims card.



answer mine?

http://answers.yahoo.com/question/index?

anyone else had any luck

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