29     private CallWaitingSwitchPreference mCWButton;  field in GsmUmtsAdditionalCallOptions
54         mCWButton = (CallWaitingSwitchPreference) prefSet.findPreference(BUTTON_CW_KEY);  in onCreate()
93         if (mCWButton != null) {  in onCreate()
96                     mCWButton.setEnabled(false);  in onCreate()
98                     mPreferences.add(mCWButton);  in onCreate()
101                 prefSet.removePreference(mCWButton);  in onCreate()
112                 if (mShowCWButton && mCWButton != null && mCWButton.isEnabled()) {  in onCreate()
113                     mCWButton.init(this, true, mPhone);  in onCreate()
161         if (mShowCWButton && mCWOverUtPrecautions && mCWButton != null) {  in onResume()
164                 if (mCWButton.isEnabled()) {  in onResume()
165                     if (mPreferences.contains(mCWButton)) {  in onResume()
166                         mPreferences.remove(mCWButton);  in onResume()
168                     mCWButton.setEnabled(false);  in onResume()
171                 if (!mPreferences.contains(mCWButton)) {  in onResume()
172                     mCWButton.setEnabled(true);  in onResume()
173                     mPreferences.add(mCWButton);  in onResume()