GSM Technology | CDMA Technology Sr. Feature GSM Technology CDMA Technology 1 Frequency 900MHz; 1800MHz;1900MHz 800MHz;1900MHz 2 Channel Bandwidth Total 25 MHz bandwidth with 200 KHz per channels, 8 timeslots per channel with frequency hopping Total 12MHz with 1.25 MHz for the spread spectrum 3 Voice Codec 13 Kbits/second 8 Kbits/second or 13 Kbps 4 Data bit rate 9.6 Kbits/second or expandable 9.6Kbits 5 SMS 160 characters of text supports 120 characters 6 SIM Card Yes No 7 Multipath Causes interference and destruction to service Used as an advantage 8 Radio Interface TDMA CDMA 9 Handoff Hard Soft 10 System Capacity Fixed and limited Flexible and higher than GSM
