Settings > ringtones+sounds > check lock unlock
I have many apps ND data on my phone don't want to hard reset anything elseSoft reset then hard reset if still not working.
What volume do you have your ringer/notifications set at? On my phone it has to be set to 4 or higher to hear the lock sound.
Hmm I'm thinkingA hard reset is your best bet... Just do a backup and restore later
l920
The only solution to dis problem is to hard reset ur device