here step by step for repair error "check sim card" lg mg160a by octopus.
1-backup eeprom.
2-flash with firmware MG160bP16-55-V10a-XXX-XX-May 09 2007+5.oct
3-the phome pwer on but not signal, now read code unlock in octopus, and enter in phone. (for enter unlock code follow step the octopus).
4-now flash the phone with firmware MG160aP16FL-AM_MOV-V10a-730-02 MAR 26 2007+10.oct
5-now the phone full ok and full signal 850/1900.
note: you phone present bad imei, only restore with ocotpus.
all thanks to ***...