Well, the N9 page on Nokia europe website clearly mentions, "Data Network: GPRS/EDGE class B, multislot class 33 HSDPA cat 10 maximum speed up to 14.4 Mbit/s, HSUPA cat 6 up to 5.7 Mbit/s WLAN IEEE802.11 a/b/g/n" Unless you know otherwise, I think that's credible & official enough.