I bought new mangoh yellow.
I use sierra USIM , so Network Operator have to be SK but,
Current Network Operator: KOR LG Uplus
root@swi-mdm9x28-wp:~# cm radio
Power: ON
Current Network Operator: KOR LG Uplus
Current RAT: Module not registered on network, RAT not available
Status: Registration was denied, usually because of invalid access credentials (LE_MRC_REG_DENIED)
Signal: Strong signal strength (4)
PS: Packet Switched Not registered (LE_MRC_REG_NONE)
band problem??
I did it bellow command
AT!ENTERCND=“A710”
AT!SELRAT=06
AT!BAND=02,“KOR LTE”,0000000000000000,0000000000000010,0000000000
AT+CGDCONT=1,“IP”,“m2m-router.lguplus.co.kr”
AT+CFUN=1,1