How do I set the volume to boost when it’s in my pocket/bag on my Samsung Galaxy Note 3?

Open the Phone  application and touch Menu  > Call settings > Increase volume in pocket.

When the feature is on a green check mark will appear. The device will increase its ringtone volume when you are carrying it in your pocket or a purse/bag.

Note: you can also access call settings from the Home screen. Touch Menu  > Settings  > Device  > Call  .