Default LTE loss with KitKat

I seem to have a small dilemma with my Galaxy S4 and was wondering if anyone could help. I just upgraded to Fenny's 4.4 and I'm noticing my LTE speeds are really slow compared to when I was 4.2 (Came from 4.2 to 4.4). Basically I have very little to no LTE speeds, though I have LTE under my data connection.

Details
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Rom: Fenny's Stock 4.4 Rooted (1.1) http://forum.xda-developers.com/show....php?t=2679913
Baseband: NB4 http://forum.xda-developers.com/show....php?t=2678774
Bootloader: MDL
Recovery: CWM Touch

Did I miss to flash anything else? I already flashed the NB4 modem. Going back to MDL modem does nothing to help.

Thanks!