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Help rotation in camera preview mode?

Hi.

Recently bought a SGA. It's my first smartphone, got most of the functions figured out but there are still two things bugging me:

1. after taking a picture in portrait mode the picture is being previewed in landscape: it's turned 90 degrees to the right and there's black space on the sides... how can i fix this? I would like the previews of the taken pictures to be shown in the same position as in which the picture has been shot originally

2. while checking the battery use i noticed that the two most battery consuming processes are: phone idle and cell standby...tried to Google the difference but can't find anything on if there's anything i can do with those processes to decrease their battery usage?

Many thanks in advance!

Marcin
 

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