According to chat reps (ZTE seems to have in-the-know reps versus most other well-known OEMs) a major update is in the works to rectify all the known issues with this phone. They seem to be a little more informative vs T-Mobile on this front. Does anyone have anything to add other than to keep checking the out-of-date software update page for this phone on T-Mobile com?
According to the ZTE rep I talked to on chat, Obsidian is an end of life product (and no more updates, I guess.)
Which phone were you talking about when you said this phone?
At the time of this posts thread the T-Mobile support community had not been redesigned yet. It was under ZTE Zmax Pro.
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