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Manufacturer: Sony Corporation
Model Name/Number: U20a (AAD-3880071-BV)
Technologies and Bands:
(3G)
UMTS FDD: Band I   Band II   Band V  
(2G)
GSM: 850 MHz   900 MHz   1800 MHz   1900 MHz  
Certification DateHardware VersionSoftware Version
2011-06-20A2.1.1.A.0.53
2011-05-24A2.1.1.C.0.0
2011-05-11A2.1.1.A.0.46
2011-03-23A2.1.1.A.0.28
2011-02-23A2.1.1.A.0.19
2011-02-08A2.1.1.A.0.16
2011-02-08A2.1.1.B.0.5
2011-02-08A2.1.1.A.0.11
2011-01-26A2.1.1.A.0.6
2011-01-21A2.1.A.0.435
2011-01-14A2.1.A.0.390
2011-01-14A2.0.2.A.0.24
2010-11-17A2.0.1.A.0.47
2010-11-05A2.0.A.0.504
2010-11-01A2.0.A.0.497
2010-10-25A2.0.A.0.453
2010-10-13A1.3.A.0.68
2010-10-05A1.2.A.1.183
2010-09-17A1.3.A.0.62
2010-09-08A1.2.A.1.181
2010-09-08A1.3.A.0.58
2010-08-26A1.3.A.0.50
2010-08-24A1.3.A.0.46
2010-08-24A1.2.A.1.175
2010-08-23A1.3.A.0.34
2010-08-06A1.3.A.0.17
2010-08-06A1.2.A.1.174
2010-07-30A1.2.A.1.172
2010-07-19A1.1.A.0.13
2010-06-30A1.2.A.1.3
2010-06-22A1.1.A.0.12
2010-06-17A1.1.A.0.9
2010-06-15A1.1.A.0.8

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