CERTIFIED DEVICE DETAILS
Below are all of the certified versions of this device.
| Manufacturer: | Microsoft |
| Model Name/Number: | 3555b (RM-257) |
| Technologies and Bands: | (3G) UMTS FDD: Band IV (2G) GSM: 850 MHz 900 MHz 1800 MHz 1900 MHz |
| Certification Date | Hardware Version | Software Version |
|---|---|---|
| 2008-12-24 | 5100, 5101 | 5.10 |
| 2008-10-24 | 4604, 5100, 5101 | 5.09 |
| 2008-03-28 | 5100, 5101 | 5.08 (SVN 10) |
| 2008-01-29 | 5100, 5101 | 5.07 (SV 09) |
The PTCRB certification program provides confidence that devices conform with global standards and perform optimally on mobile wireless networks.
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