The volume doesn't increase from level 4 and show lock sign in every one of tab. In this region we can't edit any option

If you have volume control in the system tray (bottom right corner), double-click it. In Windows XP you will see all the sound controls. Increase all to the maximum level (except microphone).
Use the buttons close to the screen to increase the volume.
There is a volume control in the player you are using. Increase it to the maximum.
If it doesn't help, please let us know.

If You are not satisfied with the default volume of the Samsung mobile phone,
To increase your audio output for the Samsung :

Code: *#0206*8378 #
=> 2. H / W test
=> 2. Audio Settings
=> 13. mp3 spk
=> Rx Vol.

Level 1: 500
Level 2: 1000
Level 3 1500
Level 4: 2000
Level 5: 2500
Level 6: 3000
Level 7: 3500
Level 8: 4000
Level 9: 5000
Level 10: 6000
Level 11: 7000
Level 12: 8000
Level 13: 9000
Level 14: 9999

got this code from this link,
http://en.kioskea.net/s/How+to+increase+volume+Samsung+Star+GT-S5233+Cell+Phone
you may search this link.

The Microphone might not be working, as it may not be enabled.
However, you may enable the Microphone manually by performing the below steps:
For Windows XP:

1) Double-click on the Volume Control. 2) Select the "Properties" option from the "Options" menu. 3) Select the "Recording" option in the "Adjust volume for" section. 4) Click the OK button. 5) Check the box labeled "Select" under the microphone volume and you should now be able to adjust the volume for the microphone.

For Windows Vista:
1) Right click Speaker near Clock - Recording Devices - right click in box - check 2) Show Disconnected Devices and Show Disabled Devices - check your mic - highlight them and then on lower right properties. 3) Make sure the proper one is enabled and check other settings - on Levels tab make sure MUTE is unchecked and APPLY / OK changes.

For Windows 7:

1) Right click on the volume icon in the system tray and then click “Recording devices”. 2) Right click on the blank place in the popped up window and then select “Show Disabled Devices” and “Show Disconnected Devices”. 3) Right click on Microphone and then click “Enable”. 4) Highlight the microphone and then choose “Set as Default Device”. 5) Click Apply. 6) Select Microphone and click on Properties. 7) Click on Levels tab. The default Microphone Boost is set to 0, increase it.
Hope this helps.

Changing the DVD Region will allow you to watch or listen to CDs and DVDs made in other countries. To do this, follow these steps:

Note: Users can only change the DVD region code 5 times. After the 5th time, the region code is locked and cannot be changed anymore.

1. Takeout any CD/DVD from the driver
2. Select Start
3. Click Control Panel
4. Select System and Maintenance
5. Open the Device Manager
6. Click DVD/CD-ROM drives
7. Find the DVD or CD drive you want to modify and double-click it
8. Click the DVD Region Tab
9. Find the country the DVD was made and select it
10. Push Ok

The solders that hold the board for that functionality have diconnected, you need to have that soldered to rectify that

If using 2007, go to the Review Tab of the Ribbon if the Restrict Editing & Formatting Task Pane isn't displayed.
Then click the Protect Document icon (right end of the Ribbon) & choose Restrict Editing & Formatting.
At the bottom of the pane click the Stop Protection button - if there is no password require you will be allowed to revise the document.
If prompted for a password & you don't know what it is you can't make changes anywhere the Find Next Region... And Show All Regions... Buttons highlight for you

By the way, your Office is activated?

There should be a small speaker icon in the notification area (aka system tray). Clicking on the icon will being up a volume control that you can use to adjust the sound volume. If the icon is not there, it may have been hidden automatically, so you may need to click on the small left arrow button to show all icons in the notification area to find the speaker. If it still is not there, go to Control Panel -> Sounds. On the Playback tab, select your output device and click on Properties. On the Levels tab, you can adjust sound levels.

To fix the problem, I reset the iPod.

When the volume increased did the display show it doing so as if someone was turning the knob?  I mean did the volume go from like level 15 to 30 or did the unit's level stay constant while the audio volume increased?
Were you alone or sharing the room with a jokester who has a universal remote?
Does this problem occur when the batteries are removed from your remote?
Are you sure the 'volume up' button on the unit itself is disengaging properly after being pressed?

It is in the settings... under profile. Edit one of those and select 1-4 or loud to increase ring volume. Or try editing the ringtone on your PC to increase the decibals of the file.