[Galaxy S III I9305 (4G LTE + 2GB RAM) Q&A, Help & ] txr33:
More detail hey.

This will depend on your rom if you are using a completely stock rom which does not show the csc in the system then you won't be able to do this unless you flash the csc into your system, but if available navigate to system/csc and open others.xml for stock Telstra it will look like this

<?xml version="1.0" encoding="UTF-8" ?>
<SamsungMobileFeauture>
<Version>ED008</Version>
<Country>AUSTRALIA</Country>
<CountryISO>AU</CountryISO>
<SalesCode>TEL</SalesCode>
<FeatureSet>
<CscFeature_Framework_HyperLinkDigit>5</CscFeature_Framework_HyperLinkDigit>
<CscFeature_Framework_EnableBidirection>TRUE</CscFeature_Framework_EnableBidirection>
<CscFeature_Framework_FilterExtraPackage>TRUE</CscFeature_Framework_FilterExtraPackage>
<CscFeature_LockScreen_DisplayPlmn>TRUE</CscFeature_LockScreen_DisplayPlmn>
<CscFeature_LockScreen_DirectCallToEcc>TRUE</CscFeature_LockScreen_DirectCallToEcc>
<CscFeature_Contact_ReplaceLabelEmergency4>TRUE</CscFeature_Contact_ReplaceLabelEmergency4>
<CscFeature_Setting_EnableMenuDownloadContents>Wallpaper,Ringtone</CscFeature_Setting_EnableMenuDownloadContents>
<CscFeature_Setting_ShortcutListInLockScreen>Phone,Messaging,Internet,Camera</CscFeature_Setting_ShortcutListInLockScreen>
<CscFeature_Setting_DisableMenuBearerInApnEdit>TRUE</CscFeature_Setting_DisableMenuBearerInApnEdit>
<CscFeature_Setting_SkipWifiActvDuringSetupWizard>TRUE</CscFeature_Setting_SkipWifiActvDuringSetupWizard>
<CscFeature_Launcher_TotalPageCount>5</CscFeature_Launcher_TotalPageCount>
<CscFeature_Launcher_DefaultPageNumber>2</CscFeature_Launcher_DefaultPageNumber>
<CscFeature_Launcher_EnableViewByAlphabetAsDefault>TRUE</CscFeature_Launcher_EnableViewByAlphabetAsDefault>
<CscFeature_Launcher_ReplaceHotseatAreaInEditMode>TRUE</CscFeature_Launcher_ReplaceHotseatAreaInEditMode>
<CscFeature_VoiceCall_EnableSSC>TRUE</CscFeature_VoiceCall_EnableSSC>
<CscFeature_VoiceCall_VvmHotKeyAs>2</CscFeature_VoiceCall_VvmHotKeyAs>
<CscFeature_VoiceCall_UseEccDialerInCaseOfNoInternalMemory>TRUE</CscFeature_VoiceCall_UseEccDialerInCaseOfNoInternalMemory>
<CscFeature_VoiceCall_RemoveCallButtonInLogsList>TRUE</CscFeature_VoiceCall_RemoveCallButtonInLogsList>
<CscFeature_Message_MinSlideDuration>5</CscFeature_Message_MinSlideDuration>
<CscFeature_Message_EnableSendingEmptySms>TRUE</CscFeature_Message_EnableSendingEmptySms>
<CscFeature_Message_SmsMaxByte>140</CscFeature_Message_SmsMaxByte>
<CscFeature_Message_EnableReplyAll>TRUE</CscFeature_Message_EnableReplyAll>
<CscFeature_Music_EnableBigPondTop10Feeds>TRUE</CscFeature_Music_EnableBigPondTop10Feeds>
<CscFeature_Gallery_DisableMenuSetAsContact>TRUE</CscFeature_Gallery_DisableMenuSetAsContact>
<CscFeature_Gallery_DisableMenuShareViaMsg>TRUE</CscFeature_Gallery_DisableMenuShareViaMsg>
<CscFeature_Gallery_AddAutoRotationIcon>TRUE</CscFeature_Gallery_AddAutoRotationIcon>
<CscFeature_FMRadio_FrequencySpaceAs>100</CscFeature_FMRadio_FrequencySpaceAs>
<CscFeature_Web_SetUAProfile>http://wap.samsungmobile.com/uaprof/%s.xml</CscFeature_Web_SetUAProfile>
<CscFeature_Web_EnableAutoSimHomeUrlInProfile>TRUE</CscFeature_Web_EnableAutoSimHomeUrlInProfile>
<CscFeature_Web_RemovePartialViewDuringHorizontalScroll>TRUE</CscFeature_Web_RemovePartialViewDuringHorizontalScroll>
<CscFeature_Web_BlockZoomBaseOnTouchPosition>TRUE</CscFeature_Web_BlockZoomBaseOnTouchPosition>
<CscFeature_GMS_SetClientIDBaseMs>android-telstra-au</CscFeature_GMS_SetClientIDBaseMs>
<CscFeature_GMS_SetClientIDBaseGmm>android-samsung</CscFeature_GMS_SetClientIDBaseGmm>
<CscFeature_GMS_SetClientIDBaseYt>android-samsung</CscFeature_GMS_SetClientIDBaseYt>
<CscFeature_GMS_SetClientIDBaseAm>android-telstra-au</CscFeature_GMS_SetClientIDBaseAm>
<CscFeature_Wifi_UseDefaultSecurityAs>WPA2/PSK</CscFeature_Wifi_UseDefaultSecurityAs>
<CscFeature_NFC_SetSecureEventType>GOOGLE</CscFeature_NFC_SetSecureEventType>
<CscFeature_NFC_SetAccessControlType>NONE</CscFeature_NFC_SetAccessControlType>
<CscFeature_NFC_DefaultCardModeConfig>ESE</CscFeature_NFC_DefaultCardModeConfig>
<CscFeature_SyncML_EnableNotiDeltaBinarySizeBeforeDownload>TRUE</CscFeature_SyncML_EnableNotiDeltaBinarySizeBeforeDownload>
<CscFeature_RIL_DisplayRatInfoInManualNetSearchList>TRUE</CscFeature_RIL_DisplayRatInfoInManualNetSearchList>
<CscFeature_RIL_SetSmsBearer>CSOnly</CscFeature_RIL_SetSmsBearer>
<CscFeature_RIL_DefaultApn4LTE>Telstra Internet,telstra.wap,,,,,,,,,505,01,0,default</CscFeature_RIL_DefaultApn4LTE>
<CscFeature_RIL_EnableDTM>TRUE</CscFeature_RIL_EnableDTM>
</FeatureSet>
</SamsungMobileFeauture>

Delete this line

<CscFeature_Launcher_ReplaceHotseatAreaInEditMode>TRUE</CscFeature_Launcher_ReplaceHotseatAreaInEditMode>

Save and reboot and enjoy an unlocked dock.

If you do not have the csc folder in system then you will need to flash this.

It is the extracted cache.img so your csc is now in the system and already includes the modded others.xml.

I found and did this as soon as I got root on my phone so I know how to do it and you can remove the other 3 csc features relating to launcher if you want and not all carriers lock the dock.

Do not flash the zip if you do not currently have the TEL CSC as it will change your CSC to TEL, it will not do any harm if you have a different CSC but it will change your CSC to TEL