If you have the T-Mobile S4 M919 and have WIFI issues on the touchwiz side please read. Every International ROM has these issues with our phone. You must flash a custom kernal like ktoonz or WIFI will not work, Please remember this info for future reference in case you decide to flash a International ROM.
I flashed ktoonz 4.2 and it works for me. I have WIFI working on both Touchwiz and google side.