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2. Code-division multiple access - Wikipedia

   en.wikipedia.org/wiki/Code-division_multiple_access

   Multiplexing. Code-division multiple access (CDMA) is a channel access method used by various radio communication technologies. CDMA is an example of multiple access, where several transmitters can send information simultaneously over a single communication channel. This allows several users to share a band of frequencies (see bandwidth).

3. Verizon (mobile network) - Wikipedia

   en.wikipedia.org/wiki/Verizon_(mobile_network)

   Verizon intended to retire its 2G and 3G CDMA network in favor of LTE and 5G on January 1, 2021, but made a last-minute decision to "indefinitely" halt the retirement. [72] They later confirmed that the CDMA network will be retired on December 31, 2022. [ 73 ]

4. List of CDMA2000 networks - Wikipedia

   en.wikipedia.org/wiki/List_of_CDMA2000_networks

   Only available in Dnipropetrovsk region from Dec 2020. Network to shut down by the end of 2025. Intertelecom. Ukraine. CDMA2000 1xRTT, EV-DO Rev. B. 800. March 2001. [25][26][27][28] Only available in Odesa region from Nov 2021.

5. CDMA2000 - Wikipedia

   en.wikipedia.org/wiki/CDMA2000

   CDMA2000 1X (IS-2000), also known as 1x and 1xRTT, is the core CDMA2000 wireless air interface standard.The designation "1x", meaning 1 times radio transmission technology, indicates the same radio frequency (RF) bandwidth as IS-95: a duplex pair of 1.25 MHz radio channels. 1xRTT almost doubles the capacity of IS-95 by adding 64 more traffic channels to the forward link, orthogonal to (in ...

6. 3G - Wikipedia

   en.wikipedia.org/wiki/3G

   3G is the third generation of wireless mobile telecommunications technology. It is the upgrade to 2G, 2.5G, GPRS and 2.75G Enhanced Data Rates for GSM Evolution networks, offering faster data transfer, and better voice quality. [1] This network was superseded by 4G, and later by 5G. This network is based on a set of standards used for mobile ...

7. Comparison of mobile phone standards - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_mobile_phone...

   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.

8. Voice over LTE - Wikipedia

   en.wikipedia.org/wiki/Voice_over_LTE

   Verizon stopped activating CDMA-only devices on their network in 2018, and had previously planned to shut down 3G service in 2019, but extended the timeline for shutting down the 3G network twice [42] — first to December 31, 2020, and then to December 31, 2022, which the VP of Network Engineering says "will not be extended again." The company ...

9. High Speed Packet Access - Wikipedia

   en.wikipedia.org/wiki/High_Speed_Packet_Access

   High-Speed Uplink Packet Access (HSUPA) is a 3G mobile telephony protocol in the HSPA family. It is specified and standardized in 3GPP Release 6 to improve the uplink data rate to 5.76 Mbit/s, extend capacity, and reduce latency. Together with additional improvements, this allows for new features such as Voice over Internet Protocol (VoIP ...