Default Q: Rooted unlocked, can't get wireless tethering working

I can't get hotspot working.
Everytime I enable hotspot, it says something like "please add hotspot plan on your metro pcs network"
I tried installing various ROMs to see any of them work such as Paranoid android, Grievous Flex, and so on.
I also tried "Enable Tethering in AT&T KitKat using SQLite Editor" Found here http://forum.xda-developers.com/show....php?t=2668453
Also tried "[MOD][10/22/13] - AT&T Tether hack - D80010d Base - No SQL stuff, just flash and go!" found here http://forum.xda-developers.com/show....php?t=2493978
None of those methods worked.

About my phone:
I have AT&T G2 unlocked and using for Metro PCS (using t-mobile's apn)
Android 4.4.2
baseband M8974A-AAAANAZM-1.0.190082
Kernel 3.4.0
Build KOT49I.D80020c
Software version D80020c

Please help me