From Phonescoop.com

"The FCC this week approved the Nokia 6638, Nokia's first Series 60 smartphone for CDMA networks. The phone sports a similar appearance to the Nokia 6630 3G phone for Europe and Asia, but contains completely different internals and slightly re-arranged side and function keys, as well as unique features for the U.S. market, such as an LED camera flash, an extendable antenna, a 2.5 mm headset jack, and E-911 capability. The 6638 is also Nokia's first phone with a full-size SD card slot; Nokia has previously used MMC and RS-MMC formats, although it announced support for the SD format last September."

http://www.phonescoop.com/news/item.php?n=1185

Also, of you have a look at the draft Manual on the FCC site, it some pictures with "Telecom" on the banner of the handset..

Telecom were one of the first carriers to get the 6255, so lets hope we will be one of the first to get this.