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.
CDMA competes with GSM today. Sprint, Virgin Mobile and Verizon Wireless use the CDMA technology standard in the U.S. Image Â© Chad Baker, Getty Images TDMA, which predates the more advanced GSM technology standard, has been incorporated into GSM. TDMA is no longer in use by the major U.S. cell phone service carriers.