How do I change the ESN number in my Samsung C390?

I have been told it's possible. I need to have two phones on the go from one number. As the samsung has a rubbish battery life I need to have one charging and one in use . Help please if possibleHow do I change the ESN number in my Samsung C390?
the ESn or IMEI is fixed int eh phone and its ILLEGAL to change it. to use the phone number on another phone you swap the SIM not the ESN.



thats ther for fraud and theft identification the SIM can work with any compatible phone.