If VoiceStream is like the other Carriers, the answer is No. You might want to talk to customer service to see if they would give you a month worth of credit. But, when you sign the contract you are locked into a 12 or 24 month commitment.
I don't think they will. Your best bet may be to drop to the 19.99 level for one month, and then go back to your original price plan.
Call Voicestream!!!! I think that there would have to be a good reason to do it!!!! also if they let you voicestream charges $10 a month for this service and will extend your contract another month or hower evey long that you do it Jack