LG KT610 Service Manual page 199

11. TEST MODE
2.5.7 Loopback Test
This menu is to test the vibration mode.
2.5.8 AES/ACS Tunning
This menu is to test acoustic echo cancellation/suppression.
2.6 Camera
Camera application will be launched.
2.7 Keypad
This menu is to test all keys.
2.8 MP Msg Viewer
This menu is to display messages from MP.
2.9 RTC Test
This menu is to display current time.
2.10 GPS
This menu is to operate GPS module.
2.11 Band Selection
This menu is to select the operating band of phone.
3. ATS/MTC
This menu is used for verifying the system stability.
4. Factory Reset
This menu is to restore factory setting value.
5. Hidden Reset Off
When crash is occurred, phone will be changed to debug mode.
6. Factory AT CMD
This menu is used for only mass production.
7. XDL
This menu is used for flashing AP and MP SW image using micro SD during mass production.
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Only for training and service purposes