this firmware is way better than HH3 and it improves hell lots of bug..
for example if you press on the physicall call button and invoke the phone dialer...press on the phone book button and try do search ..key in !!! your phone will hang with HH3!!!
but with DXHI1 it is fix...
you can try www.modaco.com to download the firmware updater yourself but pls read the instruction properly on how to do it..