Why Uplink Frequency is less than Downliny Frequency.
GSM 900:
Uplink : 890-915 Mhz
Downlink: 935-960 Mhz
GSM 1800:
Uplink : 1710-1785 Mhz
Downlink: 1805-1880 Mhz
Why cant we use uplink band as 935-960 and downlink as 990-915Mhz
Reply To: Uplink/Downlink Frequencies in GSM/CDMA