Originally Posted by sammick
If one buys an iPhone and changes services and keeps their phone number---do they have to notify the old vendor or will the transfer of the phone number when one authorizes the new phone automatically cancel the previous service.
Well I don't have an answer for you, but if memory serves me right you have to initiate cancellation of service with your carrier. I don't think an LNP (which is what transferring your number is) initiates the cancellation process for you.
Long story short, call your carrier (the old one).