Sim Lock Warner will keep you informed when you phone requiresthePIN code to unlock your SIM. With this application you willnotmiss any call or message anymore just because your phone hasrebootsilently. This application shows a notification when you PINcodeis required (ringtone and/or vibration each minute) butremainssilent when you are in airplane mode. Note : this may take alittletime between PIN request and notification. This app is reallyfree: no ads, no payment. * When you give only 1 or 2 or 3stars,please add a comment and tell me what's wrong ! otherwise, Ican'tmake it better :-/