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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.
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.
HSUPA was the second major step in the UMTS evolution process. It has since been superseded by newer technologies with higher transfer rates, such as LTE (150 Mbit/s for downlink and 50 Mbit/s for uplink) and LTE Advanced (maximum downlink rates of over 1 Gbit/s).
In telecommunications, long-term evolution (LTE) is a standard for wireless broadband communication for mobile devices and data terminals based on the GSM/EDGE and UMTS/HSPA standards.
LTE Aug 2021 5 MHz, UMTS: 20 MHz May 2015 10 MHz, GSM: N/A: N/A: 10 MHz DSS 5G NR Nov 2022 LTE Nov 2022 or 5 MHz LTE Jun 2017 and 5 MHz, UMTS, GSM - - N/A: 20 MHz Mar ...
UTRAN: UMTS; E-UTRAN: The Long Term Evolution (LTE) high speed and low latency; It is also possible for a single handset/phone to be simultaneously connected to multiple RANs. Handsets capable of this are sometimes called dual-mode handsets. For instance it is common for handsets to support both GSM and UMTS (a.k.a. "3G") RATs.