If this leaked spec sheet is correct, T-Mobile is about to step up their mobile data game with an even faster breed of HSPA phone. The Samsung Vibrant 4G is listed here as having an HSPA+ modem rated at 21Mbps. This is the full speed of the T-Mobile network, but other '4G' phones from the carrier have only 14.4 Mbps data modems. This includes the T-Mobile G2 and MyTouch 4G
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In addition to the super-fast data, the new Galaxy S variant will have mostly unchanged hardware from the current iteration. Though, it will ship with Android 2.2. Samsung has yet to bump US Galaxy S phones up to Froyo, but this news is only slightly comforting considering Gingerbread has been open source for almost a month now. We assume that the phone will have the Samsung TouchWiz skin on top of Android.

We're not sure if a minor update to the existing Vibrant will lure consumers in. it is also unclear if the faster HSPA connection will drastically affect speeds. We've found HSPA+ devices on T-Mobile to only be marginally faster than those capped at the old 7.2Mbps rates. How do you think this product will fare?