Can i have more then 1 number on 1 iphone?

I have iphone 4 and i have my number on it but is it possible to have more then one number on one phone? If so, how?

IPhones do not support dual sim.

No but you can sign into the phone with two different Apple ID's and share music files! Your number is in sync with your SIM card. If you put another sim in, your phone will use the number that is associated with the other SIM. But you would have to have pay for the service on both lines b/c activating a new SIM card automatically permanently disabled the old one, unless the number is different

You can have one phone number per SIM card. Some phones accept two SIM cards, but the iPhone does not, so you can have only one number with an iPhone.