I have the Build Nokia 920 and AT&T is still having trouble with this phone.   The tethering is turned off and multimedia messages do not work.  Internet is ok.    AT&T told me they do not recognize the phone (yet maybe later?) so these features are off.   I am not sure how others are doing with this phone.   Phone is nice, however, and it should do well.   I am seeing if I can do some low level socket apps now.