Try shutting off the 3G. Are you also using push email with the Blackjack? I'm running push email and when I leave 3G on I get about 14 hours with the usage you described. I shut off 3G and get about 30 hours. If I wasn't using push email I'd expect 40-48. Dial *#1546792*# then option 3, then 5, select GSM. If you want to switch back follow the same steps and select Auto.
“The basic layout of the HD2 is uncluttered and uncomplicated, providing only a few hardware buttons, and leaving the rest of the navigation up to that beautiful screen.”
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Ralphieboy,
Try shutting off the 3G. Are you also using push email with the Blackjack? I'm running push email and when I leave 3G on I get about 14 hours with the usage you described. I shut off 3G and get about 30 hours. If I wasn't using push email I'd expect 40-48. Dial *#1546792*# then option 3, then 5, select GSM. If you want to switch back follow the same steps and select Auto.