može biti da je greška. ali UMTS se proteže s prekidima čak do negdje 2700 MHz a ponegdje između je predviđen MSS (Mobile Satelite System) za Download
Frequency band:1920 MHz -1980 MHz and 2110 MHz - 2170 MHz (Frequency Division Duplex) UL and DL [more]

s nokijine stranice
6680
Operating Frequency
Dual mode WCDMA/GSM operation and tri-band GSM coverage on up to five continents (GSM 900/1800/1900 and WCDMA 2100 networks)
6630
Dual-mode and Tri-band Operation
Dual mode WCDMA/GSM operation and tri-band GSM coverage on up to five continents (GSM 900/1800/1900 and WCDMA 2100 networks)