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#

If your calls still get dropped, please visit Cingular store and get a new SIM card.