I installed the NottachXposed Mod on my Sprint G4 and it works great. It says for AT&T only but I haven't had any issues (others on XDA have also reported success on Sprint). Am using on the stock ROM and it offers A LOT of features that should have been included in the stock ROM. I got it mainly for removing that idiotic volume warning and for disabling the Alarm Clock icon. It allows you to do much more and make the phone customizable to point where I am almost completely happy with the way it works.
This is a wonderful solution for rooted users who don't want to switch ROMs but need the ability fix Samsung's mistakes with the software.
And it's real easy to install. Install the Xposed Framework apk and then the NoattachXposed Mod apk. Very simple.
[XPOSED MOD] NottachXposed [ROOT REQUIRED]
KUDOS to Nottach of XDA for creating this mod!