The BlackBerry 8820, one of Research in Motion’s most recent smartphones, may soon be at national GSM carrier T-Mobile.The 8820 was the first RIM phone to appear in the US with Wi-Fi, greatly increasing data speeds for some users. If adopted, the phone may also become the only other broadband BlackBerry at T-Mobile, the current one being the 8320. All 3G BlackBerries are limited to CDMA carriers.No pricing has been mentioned as of yet, but an anonymous source indicates that the phone will come on March 5th, and should be functionally identical to the AT&T version with the obvious exception of carrier-specific services