LG KF350 Service Manual page 147

10. RF CALIBRATION
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->DCS->PCS->EDGE EGSM->EDGE DCS->EDGE PCS
RX Channel compensation: EGSM->DCS->PCS
4. Phone Operation Mode
< Normal Mode >
LGE Internal Use Only
< ptest Mode >
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Only for training and service purposes