I would like to know if HD Voice is enabled on my device. If it's not, I would like to enable it. There used to be a very simple way of doing this by dialing
*#0011# and then following instructions given here. Unfortunately it appears that Samsung has patched this up now in the latest software version so it's no longer an option. My device is a Galaxy S4 Plus (GT-I9506) running Android 4.3.
So now that this is no longer an option, what options do I have to check the status of and to enable HD Voice on my device (in case it's disabled)?