How can I get the lock screen function back on my Alcatel Raven A574BL?

[Android Central Question]

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.

 

[B. Diddy]

Welcome to Android Central! What do you mean that your lockscreen function disappeared? Are you saying that you can't set a screen lock with a PIN or password?

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