This is driving me nuts. I have my BB set to use network time. Yet my BB is off by three minutes. I went into SET TIME and found that it shows Network time as 8:44 and Time as 8:47. Why are these different. I am always three minutes off from the Sprint network time.

Click the menu button on that screen and choose 'update time'.
It will force a sync of the Network time to your Device time.
(This doesn't happen automatically, and sometimes time drifts.)