Just share some tips n tricks for 5800 with you all. Got any mistake pls let me know. All compiled by me from various sources. 
General
1. Use Dialer and press # for about 2 seconds will switch the profile between Silent and General; press and hold 0 will open the web browser; press and hold 1 will open the voice mailbox
2. There is a shortcut key for Music, Gallery, Share, Video, Web shortcut at the top right corner just below the front camera
3. Press and hold the Green caller button when standby mode will activate the voice command. You could call the name from the contact or application name.
4. Organize your sms by grouping them like outlook by Messaging -> Option -> Setting -> Text message -> Other -> Show messages in groups -> Yes
5. Notification light will blink if there is unread sms/missed call. It could be turned off at Settings -> Notification light -> Off
6. If the touch input is not accurate, you could calibrate your screen at Touch Input-> Touch Screen Calibration -> ( Tap around the 4 dots at the corner)
7. Turning control functions:
  a. Rotate your screen horizontal or vertical
  b. Silence your phone for incoming call by rotate your phone with screen facing down.
  c. Snooze the alarm by rotating phone screen facing down
8. Theme effect will give 3D and transition effect if on but will slow down your tube considerably. Settings -> Personal -> Themes -> General -> Themes effects -> On/Off
9. Shortcut to exit application : Press and hold the middle white button then press and hold the program that you wish to quit, an open/exit option will pop out (useful for those haven’t install handy taskman yet)
10. When using handwriting input, slide from left to right is Spacebar, right to left is Backspace
11. Organize your menu by Menu -> option -> organize. You could drag and drop the location of the application you wish to relocate.

Battery saving
1. Always turn off wireless scanning, Bluetooth when not in use
2. For those not using 3G, choose your network mode to “GSM” instead of “Dual mode” which will consume more battery. Settings -> Connectivity -> Network mode -> GSM
3. Less Display Light
a. Setting -> Phone -> Display -> light sensor (move the slider to the left)
b. Setting -> Phone -> Display -> Light Time-Out (lesser time to save battery but annoying if too short while you are playing games)
4. Always terminate the application properly that is not using by using Option ->Exit. It might be running background and consuming battery which you don’t know.

Memory Saving
1. Restart your phone if the memory less than 30MB, you could either soft reset (User a dialer and dial 5 * * then call quickly) or hard reset by pressing the power button
2. Use Handy Taskman to close all application regularly or kill application that is not in use.

Camera & Picture
1. Some noise could be reduced if set the ISO sensitivity to low instead of auto.
2. When viewing pictures, you could use your stylus to view for previous (slide left) or next (slide right) picture like iphone feature.

Video
For converting video that is high quality to play at 5800, should use the mp4 format as below (All is 16:9 widescreen):
  a) Xvid @ 678kbps resolution 480×272 
  b) Xvid @794kpbs resolution 640×352
  c) H.264 @ 512kbps resolution 400×224
  d) H.264 @ 550kbps resolution 400×224 (Recommended)

Music
1. If you can’t find your songs after transferring from your pc to memory card, go to music player -> Option -> Refresh library

Application
1. Always install your phone theme on the memory cards. This is because if some theme does not work (Christmas tree) then you need to flash your phone.
2. Uninstall your application in proper way. Use Menu -> Setting -> Application mgr. -> Installed apps -> Choose application then option n uninstall

Known Bugs
1. While u are using music player on your phone and there is incoming calls, the phone will use the default nokia ring tone as the memory card is used by the music player.
2. The inclination sensor is over-sensitive. The screen will changed to horizontal mode even slight rotate.
3. Regarding the screen blank and locked when calling, this is because the proximity sensor if blocked it will make the screen black when calling. The block is including some glossy transparent film, so please cut out the film around the sensor located between the middle earpiece and front camera

Beware of 5800 replica from China.



Wat happen to them? Got no more idea than copying ppl?  :S