How to send AT Commands in Dual Sim Phone

Question

how to send AT commands to a dual sim phone ?
I tried AT+CSIMSEL in a C# Program (using 32feet library) but it don't work on my Nokia phone.
Thanks

I think device manufacturers have defined their own AT commands to choose the SIM. — Jayesh Bhoi, Sep 17 '14 at 12:51
It would help is you added the Nokia model to your question. — Black Frog, Sep 17 '14 at 13:09
possible duplicate of [how to send sms via a dual sim mobile using serial port](http://stackoverflow.com/questions/10106283/how-to-send-sms-via-a-dual-sim-mobile-using-serial-port) — Black Frog, Sep 17 '14 at 13:13
Is there any manual of AT commands available on the Nokia developers site? Have you searched this site? If not, then the AT command that you need may not be publically available. You could try AT+CLAC - if the phone supports that, then you get a list of supported AT commands, and you can investigate them. — user1725145, Sep 18 '14 at 09:16

score 0 · Answer 1 · edited Mar 30 '20 at 13:58

To send AT command to phone Modem your application process must run in phone process.

Android provided a API invokeOemRilRequestStrings to send AT command to Modem at Phone instance.

android:sharedUserId="android.uid.phone"

Manifest file tag

android:process="com.android.phone"

Under application tag

void SendAtToModem() {
    String s[] = new String[2];
    s[0] = "AT+XXXXX=" + "1";

AT command plus its value that you want to set

    s[1] = "";

    Phone[] phones = PhoneFactory.getPhones();
    phones[0].invokeOemRilRequestStrings(s, null);

To send at Modem 1

    phones[1].invokeOemRilRequestStrings(s, null);

To send at Modem 2

How to send AT Commands in Dual Sim Phone

1 Answers1