Are you experiencing some issues or something that would make you seek an ETA for a potential update in the works? From what I can see, the T-Mo SGS4 on MDL operates a-ok w/o any hiccups.
I talk to corporate like a BAWSS!
DEVICE ► Nexus 5 / Nexus 7
ROM ► Dirty Unicorns
KERNEL ► Stock / ElementalX