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Manufacturer: Microsoft
Model Name/Number: 6790s-1b (RM-492)
Technologies and Bands:
(3G)
UMTS FDD: Band I   Band V  
(2G)
GSM: 850 MHz   900 MHz   1800 MHz   1900 MHz  
Certification DateHardware VersionSoftware Version
2010-01-133003, 3004, 4000, 5000, 600004.01
2009-06-113003, 3004, 4000, 500003.22

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