Several months ago I installed CyanogenMod on my GS4. Samsung's pre-installed, irremovable apps slowed my RAM to an unbearable extent. However, I haven't been able to update to CM11 (mid update the phone aborts and boots un-updated, or even better, goes into a boot-loop) and the OS performance has deteriorated. At this point I just want to reinstall Android and update to KitKat, but I've had issues finding a method that works. Help?