These unlocked iPhones don't get 3G or 4G data speeds because the radios in the phones do not work on the T-Mobile network, which makes this even more amazing. Apparently these iPhone owners get what they need from the phones without support from the carrier. While you can argue that a few T-Mobile customers might do this not knowing what they are getting into, it's hard to believe that over a million folks did this without thinking things through.
While T-Mobile doesn't handle the iPhone currently, maybe that will change if the AT&T merger gets approved. Imagine what these customers will think if the phones work on the network as designed.
Image credit: Flickr user bfishadow