LG KS20 Operating Instructions Manual page 185

Phone Test Mode Scenario_ 3G smart Phone KS20 Case(5)
Item
(6) Key Press Test
(7) Acoustic Loop
Test
(8) Sound Test
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Only for training and service purposes
10. Phone Test Mode _ 3G smart Phone KS20
Order
OK
- Press a key that Red arrow indicate
1. Enable Handset acoustic loop Test
2. Enable Headset acoustic loop Test
Break
Ringtone(MP3) is played repeatly.
Break
- 187 -
Description
LGE Internal Use Only