SOURCE: http://forum.xda-developers.com/showthread.php?t=2253528

ROM: http://omega-roms.net/blog/?page_id=1231

Zatím asi jediná pořádně funkční romka na S4.

Wipe:
Omega v9.0 is a No Full wipe rom, but Full wipe is strongly recommended if you have issues!

Backup:
Make sure to make and keep in a safe place an efs backup – nadroid backup – titanium backup – etc, in case you ever need to restore!

Installation Instructions:
1. Backup

2. Copy rom to your device and flash it from recovery, recommended Recovery: TWRP Recovery – Boot to Recovery and flash Omega Rom.
There is no need to flash Stock Rom first, Flash Omega with or without wipe from Recovery and reboot device to Android

3. If wifi is not working do this to fix it:
Download XXUBMGA LTE modem (Modem can also be downloaded from Omega Files Free & Pro).
Power off your device completely, then power it up again to download mode (do not reboot at once to download mode)
Flash with odin 3.07 the XXUBMGA LTE modem, if wifi is not fixed then flash again the new LTE modem with odin and check again.
Notice this will not change your GSM Modem, if you want to change it then you can do it form Omega Files

PLEASE FOLLOW THE EASY INSTALLATION INSTRUCTIONS ELSE YOU WILL HAVE VARIOUS ISSUES!

csc:
Multi csc included in Omega

Remove bloatware:
You can know remove all bloatware during Omegas installation