Originally Posted by tytung
I didn't try it myself.
However in theory, you should be able to upgrade from 1.3 to 1.6 without any issue.
I performed that upgrade path and it was uneventful.
CM9 is the way to go -- Medroid based 1.4 & 1.5 were not favorites of mine.
Version 1.6 works great, but I really miss a working CM9 battery percentage statusbar icon...
Sent from my HD2 ICS CM9 using XDA Premium