While AT&T has already confirmed the pricing and availability details for the Blue Coral color variant of the Samsung Galaxy S7 edge smartphone, looks like T-Mobile will also start offering the new model soon. A leaked image, allegedly from T-Mobile's inventory system, clearly shows the recently-launched Galaxy S7 edge color variant listed as a new product (see item #3 in the image below). There's currently no information on exactly when the magenta carrier will start selling the device, but given that the model has already entered the carrier's systems, it'd be reasonable to assume...
Source: http://www.gsmarena.com/leak_reveals_tmobile_blue_coral_galaxy_s7_edge-news-21605.php