Thanks for your support and use of our answers forum! Although there is no special or specific function for this particular situation, I would recommend trying to key in your lock pin number with the keypad within your SlingPlayer for Android Phones. Some of the dvr controls and remote functions vary within the SlingPlayer app depending on the cable box you have connected, so I would advise trying to enter the lock pin code.
Hope this helps!
The Sling Moderation Team