BlackBerry Date/Time Source

BlackBerry Date/Time Source Explained

1. Set it to BlackBerry (the default), which gathers the information from the BlackBerry network, i.e. the RIM NOC.

2. Set it to Network, which gathers the information from the wireless carrier network, whether AT&T, T-Mobile, Verizon, Rogers, O2, Vodafone, etc.

3. Set if to Off, which does not gather any info. You set it and maintain it yourself.

Explanation: BB's Implementation of Time Zones

...this post to elaborate on the Blackberry FAQ, cited below, and to offer a real life example of how the Rim technique works. I hope it will clear up some of the confusion around this topic...

Date/Time and Time Zone Settings: BEWARE!

Network: Your phone time setting is synchronized with your wireless provider’s network time setting. That is the local time of the cell tower your phone is currently connected to wirelessly.

BlackBerry: Your phone time setting is synchronized with the BlackBerry network’s time setting. I guess that RIM has servers all over the world that know the time where they are.

Off: No external time source is used to synchronize your phone time setting.