Evo našo sam ovo za zvuk:

Boost the Omnia volume:

I've seen a lot of people asking how they can boost their volume of their headsets or when watching a movie through the loud speaker (its very low). Even ringtones are effected by this. So I thought I better finally register and post my findings for other I900 owners.

Its quite simple and does not require a hard rest.
In the phone keypad type: *#0002*28346#
You will then have a screen pop up called audio control util.
How to change the loudspeaker volume for ringtones, movies, mp3s etc
Click menu, normal then handset (the first one, Phones headset/loudspeaker) Here you can change:

Speaker volume: SPK(02) -db is less volume, I have set this to -1.5db (level)
Digital-to-analog: DAC(0C) This effects the overall volume of Mp3s, movies etc
-both headset and loud speaker.
I have set this to 0db.
Radio Volume: RVOL

How to change the headset / earphones volume.

Click menu, normal then headset (the second one, Headphones) Here you can change:

Headphones volume: HP(02) -db is less volume +db is more volume, I have set this to 0db (level)
Digital-to-analog: DAC(0C) This effects the overall volume of Mp3s, movies etc. I have set this to 0db.
Radio Volume: RVOL

*You must click menu / apply for changes to take effect,
*I recommend play a Mp3 launch the app, then apply the changes and set your prefered max volume.
*Setting high levels could damage the loud speaker or your headphones, not to mention your hearing!.