T-Mobile Confirms Windows Phone 8.1 Update Only For Lumia 521, Lumia 925 ... - Ubergizmo (blog)

It is unclear as to why T-Mobile has only chosen these particular two handsets to receive the Windows Phone 8. 1 update, so if you don’t own either of these devices and you want the Windows Phone 8. 1 update from T-Mobile, we guess you’d be out... Source: www.ubergizmo.com