Search results
Results from the WOW.Com Content Network
CDMA: CDMA2000, EV-DO: 13 (at peak) September 2013: Acquired by Verizon Wireless and AT&T Mobility. [39] AT&T Wireless Services: GSM: EDGE: 22: October 2004: Acquired by Cingular Wireless, which later rebranded to AT&T Mobility. [40] Big Sky Mobile: GSM: EDGE: Unknown: 2017: Sold spectrum licenses to AT&T and T-Mobile and exited the business ...
In 3G, the most prevalent technology was UMTS with CDMA-2000 in close contention. All radio access technologies have to solve the same problems: to divide the finite RF spectrum among multiple users as efficiently as possible. GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA. WiMAX and LTE use OFDM.
Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the four major cellular carriers in the country—AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.
These phones include combination of GSM and CDMA technology. They can be used as a GSM or CDMA phone according to the user's preference. These handsets are also called global phones. An example of this is the Samsung SCH-A790. These dual-mode handsets are compatible with both GSM and CDMA networks and are essentially two phones in one device.
Exclusive use for M2M, emergency communication and Smart Metering. Alliander Netherlands: CDMA2000 1xRTT, EV-DO Rev. A 450 May 2016: 3 MHz [5] [6] Private network for critical infrastructure. Exclusive use for M2M communication and Smart Metering. 450connect Germany: CDMA2000 1xRTT, EV-DO Rev. A 450 Nov 2016: 2x 1,25 MHz [7] [8] [9] [10]
The Universal Mobile Telecommunications System (UMTS) is a 3G mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the International Telecommunication Union IMT-2000 standard set and compares with the CDMA2000 standard set for networks based on the competing cdmaOne technology.
List of countries by number of telephone lines in use; List of countries by smartphone penetration; List of multiple-system operators; List of telecommunications companies. List of telecommunications companies in the Americas; List of telecommunications companies in Asia and Oceania; List of telecommunications companies in Europe
CDMA2000 (also known as C2K or IMT Multi‑Carrier (IMT‑MC)) is a family of 3G [1] mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites. It is developed by 3GPP2 as a backwards-compatible successor to second-generation cdmaOne (IS-95) set of standards and used especially in North America ...