Description
LG Quantum C900 Black, B Grade, AT&T GSM unlocked
Carrier-return LG Quantum C900 units in Black, 16 GB, graded B Grade as the name's B-stock token says: used, fully tested, with visible nicks and scratches, returned through a carrier channel and graded by TG on receipt. Parts buyers and prop houses that need working Windows Phone 7 sliders at the lowest cost take this lot.
The LG Quantum C900 was one of the launch Windows Phone 7 handsets in late 2010, sold by AT&T: a 3.5-inch touchscreen with a slide-out full QWERTY keyboard, a 1 GHz Qualcomm Snapdragon, 16 GB of storage, a 5 MP autofocus camera with LED flash and 720p video, Wi-Fi, Bluetooth, FM radio, GPS, DLNA streaming through the Play To app, and the Office Mobile, Xbox LIVE, and Zune hubs, on AT&T's HSPA 3G network.
TG Wireless supplies it to collector shops and enthusiasts who want a first-generation Windows Phone with a keyboard, to prop houses that need a 2010 AT&T smartphone, and to developers and parts buyers.
Key specifications
| Model | LG Quantum, C900, AT&T (2010) |
|---|---|
| Storage | 16 GB |
| Color | Black |
| Network status | AT&T, unlocked per old listing |
| Operating system | Windows Phone 7 |
| Form factor | Side-sliding full QWERTY keyboard |
| Display | 3.5-inch touchscreen |
| Processor | 1 GHz Qualcomm Snapdragon |
| Memory | 16 GB internal |
| Camera | 5 MP autofocus with LED flash, 720p HD video |
| Cellular | GSM and UMTS/HSPA 3G on AT&T bands; no LTE |
| Connectivity | Wi-Fi, Bluetooth, GPS, FM radio, DLNA Play To |
| Battery life (as listed) | Up to 6 hours talk time |
Condition: B Grade
B Grade (B-Stock) units are used, fully tested, and working, with visible nicks and/or scratches on the body or screen edges. They suit value retail and refurbishment channels where cosmetics are secondary to a tested, working unit.
Network and compatibility
The Quantum is a 2G GSM and 3G HSPA phone with no LTE. All three US national carriers retired 3G in 2022 and T-Mobile closed its 2G GSM network on August 3, 2026, so this phone gets no service on a US carrier today. Lock state is per listing; see the network status line in the table; the old listing calls these units AT&T GSM unlocked. Realistic uses are Wi-Fi use, collectors, props, parts, and export to markets with live GSM or UMTS 850/1900/2100 service.
Resale fit
- Collector shops and enthusiasts who want a launch-era Windows Phone 7 slider.
- Developers, educators, and museums that need working Windows Phone 7 hardware.
- Film and TV prop houses that need period-correct 2010 AT&T smartphones.
- Parts buyers who need donor keyboards and displays.
Ordering from TG Wireless
TG Wireless sells to the trade. Pricing is shown to approved dealer accounts, and your account manager confirms availability, quantities, and grade mix before invoicing. Orders typically ship within 24 hours of order placement by FedEx, UPS, or DHL, within the United States and internationally. TG Wireless's 12-month warranty applies, with coverage and RMA handling per your order documentation. Resellers with a valid resale certificate are not charged sales tax. The FAQ covers account setup and shipping questions.
