Android 5.1 switch dual-sim radios on and off

Question

Android 5.1 now has official support for Dual Sim phones, however there's not much currently available in the officially documented APIs. Does anybody know how, with a rooted phone, an app can switch either SIM1 or SIM 2 On and Off?

Answer 1

From the offical documentation mentioned the class SubscriptionManager,I just found something that could be switched:

DefaultVoice:

/** @hide */
    public void setDefaultVoiceSubId(int subId) {
        if (VDBG) logd("setDefaultVoiceSubId sub id = " + subId);
        try {
            ISub iSub = ISub.Stub.asInterface(ServiceManager.getService("isub"));
            if (iSub != null) {
                iSub.setDefaultVoiceSubId(subId);
            }
        } catch (RemoteException ex) {
            // ignore it
        }
    }

DefaultSms:

/** @hide */
    public void setDefaultSmsSubId(int subId) {
        if (VDBG) logd("setDefaultSmsSubId sub id = " + subId);
        try {
            ISub iSub = ISub.Stub.asInterface(ServiceManager.getService("isub"));
            if (iSub != null) {
                iSub.setDefaultSmsSubId(subId);
            }
        } catch (RemoteException ex) {
            // ignore it
        }
    }

DefaultData:

 /** @hide */
    public void setDefaultDataSubId(int subId) {
        if (VDBG) logd("setDataSubscription sub id = " + subId);
        try {
            ISub iSub = ISub.Stub.asInterface(ServiceManager.getService("isub"));
            if (iSub != null) {
                iSub.setDefaultDataSubId(subId);
            }
        } catch (RemoteException ex) {
            // ignore it
        }
    }

But as you see,most of the methods of the class is @hide,that means it's not suitable to be public in the current version(Android 5.1.1/API Level 22).But you can also call them: https://devmaze.wordpress.com/2011/01/19/using-com-android-internal-part-5-summary-and-example/

And also some information for you from this:

Android dual SIM card API