available
Updated: Oct 2026
Samsung Galaxy S21 Ultra 5G
$291
Status: available
MobGadgets reviews combine verified specifications, pricing context, and comparison analysis. Hands-on testing is stated when available. Review policy.
Should you buy the Samsung Galaxy S21 Ultra 5G?
Reasons to Buy
- 5,000 mAh battery capacity
- 6.8" Dynamic AMOLED 2X display for media and everyday use
- Exynos 2100 (5 nm) - International; Qualcomm SM8350 Snapdragon 888 5G (5 nm) - USA/China platform for daily performance
Reasons to Avoid
- Real-world camera, gaming, and battery results may differ from specs-only analysis.
Full Specifications
Launch
| Announced | 2021-01-14 |
|---|---|
| Released | 2021-01-29 |
| Device type | Phone |
| Model number | SM-G998B |
Body
| Dimensions | 165.1 x 75.6 x 8.9 mm |
|---|---|
| Weight | 227 g |
| Build | Glass front (Gorilla Glass Victus), glass back (Gorilla Glass Victus), aluminum frame |
| SIM | Nano-SIM + eSIM; Nano-SIM + Nano-SIM + eSIM (max 2 at a time) |
Display
| Type | Dynamic AMOLED 2X |
|---|---|
| Size | 6.8 inches |
| Resolution | 1440 x 3200 pixels |
| Refresh rate | 120 Hz |
| Protection | Corning Gorilla Glass Victus |
| Brightness | 1500 nits peak |
Platform
| OS | Android 11, up to 4 major Android upgrades, One UI 7 |
|---|---|
| Chipset | Exynos 2100 (5 nm) - International; Qualcomm SM8350 Snapdragon 888 5G (5 nm) - USA/China |
| CPU | Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International; Octa-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55) - USA/China |
| GPU | Mali-G78 MP14 - International; Adreno 660 - USA/China |
Memory
| RAM | 8 GB |
|---|---|
| Storage | 125 GB |
| Storage type | UFS 3.1 |
| Card slot | No |
Camera
| Rear camera | Quad: 108 MP (wide) + 10 MP (telephoto 3x) + 10 MP (periscope telephoto 10x) + 12 MP (ultrawide) |
|---|---|
| Main camera | 108 MP |
| Rear features | Laser AF, LED flash, auto-HDR, panorama |
| Selfie camera | Single: 40 MP (wide) |
| Selfie camera MP | 40 MP |
| Video | 8K@24fps, 4K@30/60fps, 1080p@30/60/120/240fps, HDR10+, stereo sound rec., gyro-EIS |
Battery
| Capacity | 5,000 mAh |
|---|---|
| Type | Li-Ion |
| Wired charging | 25W wired, PD3.0 |
| Wireless charging | 15W wireless (Qi) |
| Reverse charging | 4.5W reverse wireless |
Connectivity
| Network | GSM / CDMA / HSPA / EVDO / LTE / 5G |
|---|---|
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac/6e, dual-band, Wi-Fi Direct |
| Bluetooth | 5.2, A2DP, LE |
| GPS | GPS, GLONASS, BDS, GALILEO |
| NFC | 1 |
| USB | USB Type-C 3.2, OTG |
| Radio | FM radio (Snapdragon model only; market/operator dependent) |
Features
| Sensors | Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer |
|---|---|
| Fingerprint | under display, ultrasonic |
| Audio | Yes, with stereo speakers |
| Colors | Phantom Black, Phantom Silver, Phantom Titanium, Phantom Navy, Phantom Brown, Navy |
| SAR | 0.77 W/kg (head) 1.02 W/kg (body) |
Specifications last checked Jul 1, 2026.
Frequently Asked Questions
The Samsung Galaxy S21 Ultra 5G has Exynos 2100 (5 nm) - International; Qualcomm SM8350 Snapdragon 888 5G (5 nm) - USA/China with 8 GB RAM / 125 GB storage. That is useful buying context, but this page should be treated as specs-led analysis unless hands-on gaming tests are stated.
The verified wired charging specification is 25W wired, PD3.0 for its 5,000 mAh battery.
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