android ril java,java - Android Invoke RIL methods - Stack Overflow

You are getting RADIO_NOT_AVAILABLE response because your RIL object is not "connected" to any RILD process (RIL Deamon)

OPERATOR is a GET message that RIL sends to Baseband processor (MODEM) to detect which which operator the device is registered.

Response should be something like:

RILJ: [1234]> OPERATOR

//PLMN Number, PLMN Long Name, PLMN Short Name

RILJ: [1234]< OPERATOR {31000, Verizon Wireless, Verizon}

However, since your RIL instance is not connected to any RILD process, you will always get RADIO_NOT_AVAILABLE response. I meant, you are sending a GET message but there's no RADIO to answer your GET message.

There's a RILD process running and it is probably connected to RIL.java object created by the system. You can check RIL logs via:

adb logcat -b radio

Dual sim models sometimes has two RILD process (one for each simcard) and two RIL.java instances (one for each simcard).

I'm not sure if create a RIL java instance and connect it to a RILD process is that easy.

Not sure how you can achieve that.