According to engadget.com "For better or for worse, HTC's black, plasma-heated micro arc oxidation (MOA) finish with red accents isn't making it to T-Mobile."
and according to androidauthority.com "There’s apparently more twist to the story. The HTC One S variant that T-Mobile will ship on April 25 is the blue-ish variant of the phone, with the black & red one to be made available in June. The casing on the former won’t have the same Thor-inspired micro-arc oxidation treatment as the latter, which is a bit of a bummer."
Cause if tmoible is not coming out with MAO edition then I'll upgrade my phone next week. But if they are then I'll wait til June to get it.