Not quite a year after EV-DO Rev. C became more commonly known as Ultra Mobile Broadband
, we're now hearing that the official specifications have been published. Reportedly, the UMB specification should be "quickly converted into an official global standard by the 3GPP2 organizational partners," and with it should come "peak download data rates of 288Mbps in a 20MHz bandwidth." Notably, the release states that multi-mode, multi-band UMB devices will "leverage the existing 3G CDMA device selection to preserve economies of scale," and it's scheduled to become widely available on a worldwide basis during the first half of 2009.