Description
Samsung Galaxy S21 5G 256 GB Gray, New, GSM unlocked
The 256 GB Galaxy S21 5G in Phantom Gray, brand new, GSM unlocked, in the original box with the in-box accessories as listed. With no microSD slot on the S21, the 256 GB tier is the one power users and content-heavy business users ask for, so it earns a premium on marketplaces and in corporate orders for executives. The SKU reads G991B; confirm the variant with your account manager.
The Galaxy S21 5G is Samsung's compact 2021 flagship: a 6.2-inch Dynamic AMOLED 2X screen at 120 Hz, 8 GB of RAM, a 12 MP main camera with a 64 MP telephoto and 8K video, a 4,000 mAh battery, IP68 sealing, and a Gorilla Glass Victus front. US units run the Snapdragon 888; international units run the Exynos 2100. Samsung gave it four Android upgrades, so it runs Android 14 with current security patches.
Dealers buy the S21 from TG Wireless as a small 5G flagship that fits a wide price band: new boxed units for retail and corporate refresh, graded units for prepaid upgrades, trade-in replacement, and refurbishment intake.
Key specifications
| Model | Samsung Galaxy S21 5G (2021); SM-G991U in the US, SM-G991B international, see notes |
|---|---|
| Storage | 256 GB |
| Color | Gray |
| Network status | GSM unlocked |
| Operating system | Android 11 with One UI 3.1 as shipped, updatable through Android 14 (One UI 6.1) |
| Display | 6.2-inch Dynamic AMOLED 2X, 2400 x 1080 pixels, 48 to 120 Hz adaptive, HDR10+ |
| Chip | Qualcomm Snapdragon 888 (US) or Samsung Exynos 2100 (international), by variant |
| Memory | 8 GB RAM; no microSD slot |
| Cameras | Rear: 12 MP wide with OIS, 12 MP ultrawide, 64 MP telephoto (3x hybrid, 30x Space Zoom), 8K video. Front: 10 MP |
| Battery | 4,000 mAh, 25 W wired charging, 15 W wireless charging, Wireless PowerShare; charger not included in the box |
| Connectivity | 5G, 4G LTE, Wi-Fi 6, Bluetooth 5.0, NFC, USB-C; nano-SIM plus eSIM |
| Security | Ultrasonic in-display fingerprint reader, face recognition, Samsung Knox |
| Durability | IP68; Gorilla Glass Victus front, polycarbonate back |
| Size and weight | 151.7 x 71.2 x 7.9 mm, 169 g |
| Colors offered | Phantom Gray, Phantom White, Phantom Violet, Phantom Pink |
Condition: New
Brand new units in the original box with the original in-box accessories as listed. Nothing has been activated or reconditioned. If your channel needs sealed retail packaging rather than open-box new, say so when you request a quote so the account manager can confirm how the lot is packed.
Network and compatibility
The Galaxy S21 5G is a 5G and 4G LTE phone with VoLTE, so the 2022 US 3G retirements and the 2026 T-Mobile 2G shutdown do not affect it. Lock state is per listing; see the network status line in the table. Unlocked units register on AT&T, T-Mobile, Verizon, and their prepaid brands, but VoLTE provisioning and 5G access depend on the exact variant: the US SM-G991U carries the bands for all three, while the international SM-G991B lacks mmWave and may not be provisioned for VoLTE on every US carrier. Confirm the variant with your account manager and acceptance with the carrier before ordering volume.
Resale fit
- Prepaid and MVNO dealers selling a compact 5G Samsung flagship as the premium option at the counter.
- Corporate and institutional fleets that standardized on Knox and want a one-hand phone with four years of OS support behind it.
- Refurbishers and repair shops taking graded S21 intake for screen and battery work ahead of certified pre-owned resale.
- Marketplace and storefront resale, where Phantom Violet and Phantom Pink move as the distinctive colors.
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.
