This question already has an answer here:
- What hardware does Ubuntu Touch support? 15 answers
Is it possible to get a version of the great Ubuntu Touch for HTC HD2 Leo? HTC Leo seems to be an unsupported device?
I have started an Ubuntu Touch FAQ in order to have some answers to frequent questions available:
please look here: On which devices does this Developer Preview run?
At this point the HTC HD2 is indeed unsupported. You can however run Ubuntu on it (not touch), but someone could port Ubuntu Touch to the HD2.