Hi all. I am an owner of S4 active i9295 that fell for their "water proof" advertising took my phone under the pool to take some photos now my back and menu button doesn't work. Ive look through a few thread but there isnt any specific solution for this problem. If you experience this too I recommend 3 solution.
Button savior by KIUMIU.CA
Flash [ROM][Unofficial/Experimental][Android 4.3] CyanogenMod 10.2 for SGS4A (int'l) by LeJay
follow this guide to enable the soft key
Step 1Flash [ROM][4.3.1] unofficial SlimBean build I9295 20140209-1333 by spegelius
enable the soft key ( refer to step 2 in 2nd method)
In setting under navigation you should be able to enable and mod your softkey. For example resize the nav bar so you get more off your screen back..
That's it. Hope this help
Credit goes to all the developer that I mentioned and the developer of cm and slimbean