i changed my number but cant make calls and when somone calls me it goes straight to my voice mail
Have you rebooted your phone since the number change?
Contact C.S. service if your Not close to a Store an have them help ya out..All that might needs to be done is Removing the Sim Card an Re-installing it.. But like i said give Customer Service a Call because there may be something in there that needs them to go into your Account and Adjust..