How can I get the lock screen function back on my Alcatel Raven A574BL? Ask a Question October 18, 2020 Android ForumsLeave a Comment on How can I get the lock screen function back on my Alcatel Raven A574BL? It disappeared and I cannot restore it by restarting the device or removing the battery for 30 seconds at least. Settings app keeps stopping and I can’t drag down the notification panel to access other features. Source Sharing is caring!