Both Lumia 830 and Lumia 735 may list in US soon, if FCC certifications are some indication. We have earlier reported that Verizon will get Lumia 735 and AT&T may get both Lumia 830 and Lumia 735. AT&T has confirmed to carry Lumia 830 already. But, now it seems T-Mobile may be in the line too to receive them.
It is surprising though to see that both RM-983 and RM-985 variants of Lumia 830 have similar set of network bands, but we know that RM-985 is the Latin America variant. In case of Lumia 735, RM-1039 may be the only US variant passing certification for now, though we expect one more variant, specific to Verizon landing sometime in future.