I was in an Alltel store a few weeks ago asking about tethering my BB to my computer. The sales rep said that tethering is about another $30 a month, but she told me that if I just used it after 7 and on weekends (which is fine, cause I work/go to school during the day anyway), it would not charge me since using data without a plan just uses your minutes. Can anybody confirm the validity of this before I start tethering?