Since I have owned the Nokia Lumia 530 Windows Phone 8.1. I have experienced one issue after the other. Freezing and locking screen issues. Unable to power phone off unless I remove the battery for at least 5-10 minutes. Apps appear to open but never completely start. When you select an app to open you are immediately returned to the home screen. My map and navigation apps frequently experience this issue. I have come to the conclusion that buying this phone was a true waste. I have decided from now on I will only purchase Android.