I thought others might like to know a definition that works for me. A system is a procedure, process, method, or course of action designed to achieve a specific result. Its component parts and interrelated steps work together for the good of the whole.
Thank you all, for the answers. Still one nagging question, though: NOt stated by T-Mobile on the 4G LTE Overview page is its use of the 1900 MHz frequency. As mentioned in the 4G Overview Additional Info, T-Mobile is switching some 1900 MHz frequency from EDGE to HSPA+.This will allow devices that work on 1900 MHz, such as AT&T devices, to use our 4G network..e: LTE Band # and Frequency. Don't let anyone else tell you otherwise, HSPA+ is an addition to the 3G standard to provide higher data rates than originally scheduled. What T-Mobile's doing is moving 3G/HSPA+ service off its 1700 MHz band and onto 1900MHz, where more phones support it globally.
UMTS 850/1900; GSM/GPRS 850/1900. LTE coverage available in Mexico City, Guadalajara and Monterrey. Click on the LTE Coverage Map link below (page/map is in Spanish), then select the Red 4G LTE tab at the top of the map for coverage details in each city. LTE Coverage Map. For detailed UMTS coverage and ability to search by city/state, click on the 3G/UMTS Coverage Map link below (page/map is in Spanish). Use the Selecciona tu estada drop down to select the Mexico state, then use the Selecciona tu ciudad drop down to select the city.