Two versions of the device are currently offered. Both versions support four GSM radio frequencies (850/900/1800/1900), but the supported 3G/UMTS bands will differ depending on the version selected. When ordering, you'll be able to select either of the following devices:
- 3G coverage on networks that use the 850 MHz, 1900 MHz, and 2100 MHz frequency bands (recommended for use on AT&T in the US and Rogers Wireless in Canada)
- 3G coverage on networks that use the 900 MHz, AWS, and 2100 MHz frequency bands (recommended for use on T-Mobile in the US)
In addition, the Nexus One will deliver 2G/EDGE speeds on these networks and also supports WiFi.
These cover most major GSM mobile providers worldwide; however, if you're unsure of the bands supported by your mobile service provider, please contact your provider directly prior to purchase.