just tried this, it worked! I previously had baseband dated 23februari, and had very bad call quality sometimes. I will test if it's any better now...
Maybe worth to mention, but if you flash this baseband your phone gets a hard reset, so you will loose all your settings and apps!
HTC TYTN II (sold)
Samsung Galaxy S 8gb (why didn't i discover android sooner...)
Samsung galaxy S2
HTC one X international
Asus TF700 infinity 64GB + Dock