Unofficial software makes the Diamond quad-band
Head over to the thread at the XDA-developers forum and make sure you are downloading a correct radio version (it should be marked as quad-band). If you are not sure what you are doing, please read the same thread; a number of users report that it is really doing the 850 magic.
HTC Touch Diamond Specifications | Review
:( : ( i want CDMA NOW!!!
2. f0nefan (unregistered)
it will become world gsm phone (quadband), Well HTC Quad band is already available in the market u can find it on the web too have a look herehttp://sntradersonline.com/pho
...ct_id=snp933in there words u can say that its an American version too