Are there any extensions of changing your data plan or other fees associated with changing your data plan not listed online? I don't want to hit the confirm button only to see a change to my plan end date or a fee for changing my data plan. My current plan is 4 GB for $56, the new would be $40, so I'd be saving $16, but if it will change my contract end date or add any fees its not worth it. My contract end date is next month. Thanks