„Default Blackjack settings from Cingular have the following problems:

* Battery life is short because frequent sync drains too much battery
* Dropped calls happen often due to network transition from 3G to Edge

In order to make your new Blackjack functional, you need to do the following:

* Get an extended battery from Cingular store if you don’t have one already
* Turn off beaming if you don’t need it
* Turn down screen brightness
* Change Sync interval to be 30 or 60 minutes. Instant sync will drain your battery very fast
* Force Edge/GSM, rather than 3G/WCDMA
* Phone calls get dropped consistently as network transitions from 3G to Edge
1. * Enter *#1546792*#
2. * Choose Network and Call settings
3. * Choose Network Mode
4. * Choose GSM and hit Done
5. * If you need a password, it is *#81230#“

Eugene Siu’s MSDN Blog

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