How could i change my phone service provider without change my number?

i am in Virgin media i want to change it to 3

thanksHow could i change my phone service provider without change my number?
To change wireless companies without losing your current number you would need to contact the new company and tell them you want to ';port'; your number from Virgin. To do this, you will need your Virgin account number and any passwords associated with your account. ';Porting'; transfers your number from your current carrier to a new one. You will not need to contact Virgin directly to cancel your account, as it will be cancelled automatically once the port goes through. If you do cancel your account directly through Virgin you will not be able to port your number to another carrier.How could i change my phone service provider without change my number?
Have the new company port your number...
Hi,

To avail this facility in India you will have to wait till 2010. The service charge will be Rs. 19/- only (Charges fixed by Telecom Regulatory Authority of India). One another news for you.. Cell numbers will be of 11 digits from 2010.

Hope this information will help you.

Thanks