Nokia N900 Carriers

United Kingdom

GSM/GPRS/EDGE
The Nokia N900 will operate with nearly all GSM network providers in the United Kingdom on GSM, GPRS 2G, and EDGE 3G networks which use the GSM-900 and GSM-1800 frequency bands. These include Orange UK, T-Mobile UK, Telefónica O2, Vodafone, all of their MVNOs, and most small and/or regional non-MVNO providers.[71] [72] At the present time (5 January 2009), the 3 network cannot be used because its SIMs are rejected by the N900 (some very old ones are accepted). Nokia have confirmed the issue is fixed internally, but the fix will not be publically available until the next major firmware update, whose release is proving later than anticipated.

WCDMA/HSPA
The N900 will operate with nearly all network providers in the United Kingdom on UMTS 3G networks which use the 2100 MHz UMTS frequency band, with the notable exception of 3 at the time of writing (5 January 2009), due to the SIM issue described above.

United States

GSM/GPRS/EDGE
The Nokia N900 will operate with nearly all GSM network providers in the United States And other countries on GSM, GPRS 2.5G, and EDGE 2.75G networks which use the GSM-850 and GSM-1900 frequency bands. These include T-Mobile USA, AT&T Mobility, all of their MVNOs, and most small and/or regional non-MVNO providers.

WCDMA/HSPA
Of the two major GSM carriers, the device will only operate on the T-Mobile USA WCDMA and HSPA 3G networks which use the 1700 and 2100 MHz UMTS frequency bands. It will not function on the AT&T Mobility UMTS 3G networks which use the incompatible 850 and 1900 MHz UMTS frequency bands.
T-Mobile has also started to roll out 21 Mbit/s HSPA+ in the United States, although the N900 will be limited to 10.1 Mbit/s with these cell sites.[73]

Canada

GSM/GPRS/EDGE
The Nokia N900 will operate with nearly all GSM network providers in Canada on GSM, GPRS 2G, and EDGE 3G networks which use the GSM-850 and GSM-1900 frequency bands. These include Rogers Wireless, Fido Solutions, all of their MVNOs, and most small and/or regional non-MVNO providers.

WCDMA/HSPA
It will not function on any of the current Rogers Wireless, Fido Solutions, Telus or Bell Mobility UMTS 3G networks which use the incompatible 850 and 1900 MHz UMTS frequency bands. It will however be able to operate on WIND Mobile which operates on the same 1700 UMTS frequency as T-Mobile