The Accelerate Internet feature will close the applications that are running in background and using your internet.
To use Accelerate Internet on your phone, you have two options:
1) Open DFNDR Performance, tap on Accelerate Internet shortcut located at the bottom of the main screen.
2) Open DFNDR Performance, tap on TOOLS tab and select the Accelerate internet feature.
3) Wait for the speed up process to complete and, it's ready!