GSM 900: Uplink: 890.0 - 915.0 MHz, Downlink: 935.0 - 960.0 Mhz, Kanali: 1 - 124
EGSM 900: Uplink: 880.0 - 915.0 MHz, Downlink: 925.0 - 960.0 MHz, Kanali: 975 - 1023, 0-124


http://en.wikipedia.org/wiki/GSM_frequency_ranges