Seams like the new HTC Vision aka Vanguard will be coming this summer. According with T-Mobile USA official Twitter account, the magenta company will offer its first HSPA+ phone this summer. This is big, just few days ago T-Mobile announced its HSPA+ network reaching speeds up to 21Mbps. Unfortunately there is not phone to handle that speed. No until this summer that T-Mobile will offer its first HSPA+ phone, possibly the HTC Vision/Vanguard.
More information will be reveled in the next few weeks.