If you're determined to get an Android slider on T-Mobile, then perhaps the upcoming T-Mobile G2 is the phone for you.  However, its specs may change your mind.

The company's insider newsletter T-Mobile Scoop reveals that the HTC Vision, aka the T-Mobile G2, will be using an 800 MHz MSM7x30 chip.  That chip uses the Qualcomm's Scorpion ARM CPU, also found in the 1 GHz Snapdragon.  

The lower clock speed seems like a bit of a blow.  But when you factor in that the 1 GHz Snapdragon crunched approximately 2.5 times less frames than the Samsung 1 GHz Hummingbird (a Cortex A8) in the GLSBenchmark, it appears even worse, given that the CPU core appears to have certain design shortcomings in the first place.

The good news is that the slower CPU will at least be somewhat offset by the operating system; the G2 will run Android 2.2 "Froyo" (which notably comes packing Flash 10.1).  As we previously discussed, Froyo brings a Just-in-Time Java compiler to the table, which allows Android applications to run up to five times faster.  Thus even this slow CPU may be capable of some decent performance.

Reportedly HTC isn't going to lay the Sense UI on top of this particular Froyo build.  That should offer better performance, and either improved or deteriorated usability, depending on your perspective on HTC Sense.  T-Mobile does brag that the phone will include "one-touch quick keys" to quickly access key functions.

The G2 has a couple of key advantages -- namely, that it has a physical keyboard, it's T-Mobile's first HSPA+ phone, and that it's on one of the most appealing networks in terms of contractual obligations and price.  However, in the face of phones like the Epic 4G and HTC EVO 4G -- also on a well-priced network -- the G2 faces some stiff competition.