Detecting “use only 2G networks” setting

Question

Is there a way of returning the value of Android\'s mobile network setting for \"use only 2G networks\"?

The app being developed measures the internet speed at a certain

Answer 1

For a small subset of devices (specifically for the LG Optimus 2X Speed, LG-P990), an answer seems to be:

int enabled = Settings.Secure.getInt(getContentResolver(),
        "preferred_network_mode", -1);
Log.d("MYAPP", "2G only enabled: " + enabled);

Where the "use only 2G networks" setting is specified as:

• 0 indicates the setting is disabled
• 1 indicates the setting is enabled
• -1 indicates the setting is not set (some devices?)

How I discovered this? I gathered all the key/value pairs from Settings.Secure using the following:

ContentResolver cr = getContentResolver();
Cursor cursor = cr.query(Settings.Secure.CONTENT_URI, null, null, null, null);
if (cursor.moveToFirst()) {
    while (!cursor.isAfterLast()) {
        Log.d("MYAPP", "cursor: "
                + cursor.getString(0) + ", "
                + cursor.getString(1) + ", "
                + cursor.getString(2));
        cursor.moveToNext();
    }
}

I compared results between enabling and disabling the setting, and sure enough I got:

07-08 00:15:20.991: DEBUG/MYAPP(13813): cursor: 5154, preferred_network_mode, 1

Do NOT use the index column (5154 in the example above), as I've noticed it changes between toggling the setting.

Although this correlates with some documentation for Settings.Secure I found online, this value isn't respected by all phones.

If your device returns -1, perhaps listing the key value pairs will reveal which setting you need. Please comment if you encounter it!