Although AT&T and Verizon have both announced and launched their variants of the Moto X, T-Mobile customers are still waiting for the carrier to expand on its vague statements from the Moto X's initial launch day. Back when it was announced, T-Mobile's official statement was that the carrier wouldn't be selling the handset directly, but rather Motorola would be handling the distribution. The above training documentation obtained by TmoNews seems to indicate that Google Play, not Motorola, will be handling the sales instead.
A certain launch date or any other details aren't available at the moment, but this one makes us scratch our heads a little bit. Is T-Mobile expecting to just support an unlocked version of the Moto X? That could certainly be the case, but then we're unsure how pricing will break down. We haven't seen Google Play sell devices with contracts or financing — the main way T-Mobile sells phones — before, and we don't really see it starting now.
Hopefully we get a better feel for when the handset will be available for T-Mobile, as well as Sprint, in the coming weeks.