Description
Samsung Galaxy S21 Ultra 5G G998U 128 GB Black, A Grade (A-stock), GSM/CDMA unlocked
A-stock Samsung Galaxy S21 Ultra 5G G998U in Black with 128 GB, GSM/CDMA unlocked: lightly used, fully tested, with very minor nicks or scratches at most. The 128 GB Ultra gives prepaid dealers and fleet buyers the 108 MP camera, 10x zoom, and S Pen support at the lowest storage tier, and the US variant activates on any major carrier.
The Galaxy S21 Ultra 5G G998U is the US variant of Samsung's 2021 top model, the Galaxy that first supported the S Pen and carried two telephoto cameras. The 128 GB configuration still packs 12 GB of RAM, a 6.8-inch 120 Hz QHD+ Dynamic AMOLED 2X display, the Snapdragon 888, a 108 MP main camera with 3x and 10x periscope zoom and 8K video, a 40 MP front camera, a 5,000 mAh battery, and IP68 sealing, with updates through Android 14. TG Wireless supplies this A-stock unit to prepaid and MVNO dealers, corporate fleets, and marketplace sellers who want a tested multi-carrier Ultra in black.
Key specifications
| Model | Samsung Galaxy S21 Ultra 5G SM-G998U (2021), US variant |
|---|---|
| Storage | 128 GB |
| Color | Black |
| Network status | GSM/CDMA unlocked |
| Operating system | Android 11 as shipped, updated through Android 14 with One UI 6 |
| Display | 6.8-inch Dynamic AMOLED 2X, 3200 x 1440, 120 Hz adaptive, Gorilla Glass Victus |
| Chipset | Qualcomm Snapdragon 888, 5 nm |
| Memory | 12 GB RAM with 128 GB storage |
| Rear camera | 108 MP wide, 10 MP 3x telephoto, 10 MP 10x periscope telephoto, 12 MP ultra-wide; 8K video |
| Front camera | 40 MP |
| Battery | 5,000 mAh, 25 W wired charging, wireless charging, Wireless PowerShare |
| S Pen | Supported (S Pen sold separately, not built in) |
| Durability | IP68 |
| Build | Glass back, no microSD slot, Ultra Wideband |
Condition: A Grade
A Grade (A-Stock) units are lightly used, fully tested, and working, and may show very minor nicks or scratches. Units are supplied as graded; ask your account manager about packaging (original box, accessories, or handset only) when you request a quote.
Network and compatibility
The Galaxy S21 Ultra G998U is a 5G phone with full 4G LTE and VoLTE, so the US 2G and 3G retirements do not affect it. Lock state is per listing; see the network status line in the table. Unlocked US units carry the band set for AT&T, T-Mobile, Verizon, and their prepaid brands, including sub-6 GHz and mmWave 5G, and most activate without issue. 5G provisioning and VoLTE acceptance still depend on each carrier's current device list, so confirm with the carrier before quoting activations in volume.
Resale fit
- Prepaid and MVNO dealers whose customers want a 5G Samsung flagship at a used-market ticket.
- Corporate, institutional, and fleet buyers standardizing on one unlocked 5G model.
- Marketplace and storefront sellers who list graded units with consistent cosmetics.
- Refurbishers and repair shops that source working units for resale or parts.
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.
