The T-Mobile G2 has finally made its debut on HTC’s U.S. website. The timing is no coincidence since HTC is expected to unveil the HTC Vision (aka HTC Desire Z) at tomorrow’s press event in London. The specs that HTC has posted pretty much confirm everything we have assumed so far. The T-Mobile G2 isn’t expected to blow any of the competition out of the water, but it should be able to take on Samsung’s Galaxy S lineup head-on. The T-Mobile G2 will be a natural upgrade for all those who purchased the original Android phone and is a must-buy device for techies who simply can’t stand manufacturers’ custom UI’s.