LG AT&T GR500 Service Manual page 187

10. CALIBRATION
Select a Logic Operation menu.
Select LOGIC MODE that you want.
Select UART Port for only S/B1 to communicate with mobile phone.
LGE Internal Use Only
1. CAL only
2. AUTO only
3. CAL + AUTO
- 188 - Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes