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The key features of the MC55i at a glance:

• GPRS Class 10 for 43 kbps in uplink and 86 kbps in downlink
• Quad-Band (850/9000/1800/1900 MHz)
• 50 pin B2B connector
• RIL driver for MS Windows Mobile 6.1 based devices
• TCP/IP over AT
• Two serial interfaces
• Extended temperature range: -40°C to +70°C

• Frequency:	双频/四频GSM/GPRS
  Dimensions:	35 x 32.5 x 3.1mm
  Normal Temp:	-20°C to +55°C
  Connect Mode:	板对板连接