When a call is disconnected, the person who doesn't return the call immediately gets displayed "CALL FAILURE" on their screen. Once you SLIDE TO UNLOCK, it will automatically call that dropped call. How do you deactivate this? Late last night, the person called me back to finish our call. Later that late evening, I had to make a call, I couldn't stop the CALL FAILURE feature from dialing the recent dropped call number. I didn't want to wake them up, as I knew it was already past midnight their time and was still early in my time zone. Thanks.