to get cdma dbm on android device

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http://stackoverflow.com – I had tried this one to show my evdo dbm. it could run on my emulator but couldnt on my real device, why? is there somethinh wrong ? this my source code : package com.cdbmsof2; import android.app.Activity; import android.content.Context; import android.os.Bundle; import android.telephony.PhoneStateListener; import android.telephony.SignalStrength; import android.telephony.TelephonyManager; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; public c (HowTos)