Unable to fetch Mobile number on Android 2.2
<p>I have used the standard code below to fetch the mobile number on my ANDROID 2.2 GSM device, BUT I ALWAYS GET AN EMPTY STRING. Is this feature supported on 2.2? 
Any suggestion as to how I can fetch the mobile number on Android 2.2 device.</p>

<pre><code>private String getMyPhoneNumber(){
    TelephonyManager mTelephonyMgr;
    mTelephonyMgr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE); 
    return mTelephonyMgr.getLine1Number();
}
</code></pre>
