LG GS290 Service Manual page 138

GS290 Operational Description
2.10. Calibration data will be saved to the following folder.
Notices:
1. The state of Phone is " test mode " during the CALIBRATION.
2. Calibration program automatically changes either "normal mode" or "ptest mode".
3. RF Calibration steps as follow:
TX Channel compensation: EGSM->GSM850->DCS->PCS->EDGE EGSM->EDGE GSM850->EDGE DCS->EDGE PCS
RX Channel compensation: EGSM->GSM850->DCS->PCS
4. Phone Operation Mode
< Normal Mode >
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< Ptest Mode>
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10.ENGINEERING MODE
Revision B
LGE Internal Use Only
LGE Property