G2403M

GPRS MODEM: Q2403A 900/1800M. Serial interface and takes your SIM card. Uses AT command set. Industrial enclosure with adjustable mounting tabs - or use a continuous piece of material that fits the tab slot. Can be mounted in vehicles or on machinery, etc. A remote antenna can be used with your cable. Includes a 12V DC power supply and serial cable. 2 year warranty. Please note: 900/1800 is primarily for Asia and Europe! We will get 850/1900 for US, Canda, and much of South America soon. If you bought a 900/1800 by mistake, we will exchange.

From Wikepedia:

GSM-900 and GSM-1800 are used in most parts of the world: Europe, Middle East, Africa, Australia, Oceania (and most of Asia). In South and Central America these countries use the following:

• Costa Rica - GSM-1800
• Brazil - GSM-850, 900, 1800 and 1900  (everything works here)
• Guatemala - GSM-850, GSM-900 and 1900
• El Salvador - GSM-850, GSM-900 and 1900

In North America, GSM operates on the primary mobile communication bands 850 MHz and 1900 MHz. In Canada, GSM-1900 is the primary band used in urban areas with 850 as a backup, and GSM-850 being the primary rural band. In the United States, regulatory requirements determine which area can use which band.

Need docs? We are still sorting though them. The Sierra site has what you need.