How to LOCK/UNLOCK The DUAL MESSENGER of Advanced features.The "S Secure" and other 3rd party "App Lock" apps not showing the "Dual Messenger" in the app list.Please help me about that as well as give me Solutions for above issue. 

Device working Slow.Apps take more time for opening.How to solve?

Secure Folder and Samsung Pass very useful and secured apps.But unfortunately M40 users not getting those app's advantages.