mobile

I haven't been on here in months so I made a new account..... I don't really know what has been going on but I just now found out there is an update for the SGS4 from AT&T. I am currently running 4.4.2. When I got my phone I tried updating to 4.4.4 but had no luck... I messed up so I had to reinstall stock version 4.4 via Odin. I rooted my phone via Towelroot & everything was just decent i guess, I still had 4.4.2... Now that I hear there is the 5.0.1 update, i decided to try & install via Samsung Kies 3 didn't show any updates, I tried OTA , didn't work. I assumed it was because my phone was rooted so I did a hard reset (pointless since root was still installed after) so I had to reinstall stock firmware and tried to do the update again via SK3 & OTA, but still, nothing.
I don't know what to try anymore. Here is my phone information.

Model Number: SAMSUNG-SGH-I337
Android Version: 4.4.2
Baseband Version: I337UCUFNB1
Kernal Version:
3.4.0-505595
dpi@SWDD5521 #1
Tue Feb 11 22:24:31 KST 2014
Build Number: KOT49H.I337UCUFNB1
SE for Android Status:
Enforcing
SEPF_SAMSUNG-SGH-I337_4.4.2_0004
Tue Feb 11 22:24:13 2014
Secure Boot Status: Type: Samsung
Security Software Version: MDF V1.0 Release 2

My phone was unlocked by AT&T & it's currently being used on T-Mobile's network.