Microsoft smartphone market chief recently hinted that the first devices carrying Microsoft branding (rather than "Nokia" branding) were just around the corner. Based on regulatory filing traffic, a document stream that's now carefully scrutinized by phone bloggers as an official source of near-release devices, the first Microsoft-branded smartphone carry the device IDs "RM-1089", "RM-1090", and "RM-1091.
Past Nokia-branded Microsoft smartphones have carried the RM-XXX or RM-1XXX branding. For example:
- Nokia Lumia 630: RM-976 (single-SIM, HSPA+)
- Nokia Lumia 635: RM-974, RM-975, RM-977, RM-978, RM-979 (dual-SIM, LTE)
- Nokia Lumia 730: RM-1038 (dual-SIM, HSPA+)
- Nokia Lumia 735: RM-1040 (single-SIM, LTE)
The latest devices, which are expected to carry Microsoft branding, are reportedly budget/mid-range models "in-between" the Lumia 630 and Lumia 730. One possible branding is "Microsoft Lumia 640/645". The different numbers correspond to their cellular capabilities:
- RM-1089 -- CDMA/GSM/HSPA+, single-SIM
- RM-1090 -- CDMA/GSM/HSPA+, dual-SIM
- RM-1091 -- CDMA/GSM/HSPA+, single-SIM
Here's the information gleaned from the U.S. Federal Communications Commission (FCC), Chinese, and Indonesian regulatory filings on the device:
- Windows Phone 8.1 Update 1
- Dimensions (face)
- 139.97 x 71 mm (5.51 x 2.795 in)
- 5-inch (?) (inferred from face dimensions)
- 960 x 540
- "Clear Black" IPS LCD
- Front + Rear (w/ LED flash)
- CDMA and HSUPA
- HSUPA/WCDMA900 (Band 8)
- HSUPA/WCDMA2100 (Band 1)
An account by the name of "wp.ithome.com" on Chinese micro-blogging platform Weibo also shared these pictures from China's telecommunications regulators, confirming the phone is a Microsoft-branded device.
These devices appear to heavily target the Asiatic markets (China, Indonesia), but their appearance at the FCC indicates they may land on budget carriers like T-Mobile U.S., Inc. (TMUS), T-Mobile's MetroPCS, or AT&T, Inc.'s (T) Cricket Wireless.