� Global system for mobile (GSM): The two frequency bands used by GSM are 890 � 960 MHz and 1710 � 1880 MHz. They are sometimes referred to as the 900-MHz band and the 1800-MHz band.
� Code-division multiple accesses (CDMA): The IS-95 standard defines the use of the 800- and 1900-MHz bands for CDMA cellular systems.
� 3G wideband CDMA (WCDMA)/universal mobile telecommunications system (UMTS): Three frequency bands are allocated for 3G UMTS services: 1900 � 1980 MHz, 2020� 2025 MHz, and 2110� 2190 MHz.
� 3G CDMA 2000: This system reuses existing CDMA frequency bands.
Source of Information : Elsevier Wireless Networking Complete 2010