I too find this interesting. However my pessimistic nature tends me to think:
a) as John Clark noted this could be for international.
b) this is a simple miss interpretation. Saying these are T-Mobile 8120/8130 housings is just of of what has been typed on cnn.cn, there is no T-Mobile branding on the actual part (atleast as for what I can see in the pictures). Lastly when cnn.cn got the new Ruby and Sapphire parts, they could have speculated or misunderstood with T-Mobile USA's release of the color pearls back in sept, but the recent name changes, from red to Ruby, and Blue to Sapphire. Nevertheless it is really hard to say, but I am with everyone hoping for the best.