XDA Senior Member tezet started an Alpha version of CyanogenMod 9 several months ago in order to give users a taste of CM9 on their Milestone 2. Though labelled an alpha build, a large number of the standard functions of the phone are functional. However, video functions still remain problematic.
XDA Senior Member sfc3001 has taken tezet’s ROM as a base and continued the CyanogenMod 9 development with his own creation. Also labelled an alpha build, this ROM has only a small number of outstanding issues that are by no means show stoppers. These include WiFi tether and phone encryption.
Taking it one step further, tezet has also produced a Jelly Bean-based CyanogenMod 10 ROM for the Milestone 2. Development is very much active, with regular updates. Amazingly, there are no major issues that limit the ROM’s functionality.
These custom ROMs, as with all others, are a testament to the great work the developers here on XDA put into keeping these older devices alive with much newer flavors of Google’s Android operating system.
If you would like to CM your Milestone 2, take your pick of these threads: