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Manufacturer: Microsoft
Model Name/Number: RM-420 / E66-3
Technologies and Bands:
(3G)
UMTS FDD: Band I   Band V  
(2G)
GSM: 850 MHz   900 MHz   1800 MHz   1900 MHz  
Certification DateHardware VersionSoftware Version
2009-03-180530, 0531, 0730, 0731, 0732210.21.007
2008-12-080530, 0531, 0730, 0731, 0732200.21.118
2008-10-100530, 0531, 0532, 0730, 0731110.07.126
2008-10-100530, 0531, 0532, 0730, 0731102.07.81
2008-10-100530, 0531, 0532, 0730, 0731101.07.79
2008-07-230530, 0531, 0532, 0730100.07.78

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