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Manufacturer: Microsoft
Model Name/Number: RM-977_b
Technologies and Bands:
(3G)
UMTS FDD: Band I   Band II   Band V   Band VIII  
(2G)
GSM: 850 MHz   900 MHz   1800 MHz   1900 MHz  
Certification DateHardware VersionSoftware Version
2015-06-232205, 2320, 3020, 3030, 4020, 403002040.00021.15235.50019 / 02040.00021.15235.50000
2015-03-262205, 2320, 3020, 3030, 4020, 403002040.00021.15053.36000
2014-06-232205, 2320, 3020, 3030, 4020, 403001061.00062.14216.48014 / 01061.00062.14216.48000

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