How to increase the Samsung Galaxy S3 's ringtone volume when it is in pocket or a bag?
STEP 1. GETTING STARTED
a). Tap on Phone as shown below.
b). Now, Tap on Menu as shown below. A Pop-up will appear. Tap on Call Settings.
STEP 2. ENABLING THE VOLUME INCREASE IN POCKET
c). Under Call Settings , Tap on Increase volume in pocket.
Observe that Increase volume in pocket has been enabled. This will automatically increase the Ringtone volume when the device is in Pocket or a Bag and a call arrives.