for three minutes to load or unload passengers. Commercial loading zones are in effect between 6:00 AM and 6:00 PM, Sundays and City holidays excepted, unless otherwise posted. Blue Green . ONE-HOUR AND TWO-HOUR TIME LIMIT PARKING ZONES . Time limit parking zones are designated by signs. These zones are in effect 8:00 AM to 6:00 PM,
All 5 wireless providers also maintain legacy networks; of these, AT&T and T-Mobile use 2G GSM/EDGE and 3G UMTS (mostly converted to 4G HSPA+), while Verizon, Sprint, and U.S. Cellular use cdmaOne/EV-DO/1xRTT.
GSM is also the basis for Integrated Digital Enhanced Network (iDEN), a popular system introduced by Motorola and used by Nextel. The incredible growth of GSM is a big part of why the acronym is now commonly thought of as standing for the Global System for Mobile communications! If you were on a cell phone in Europe, you'd be using the GSM service.