Compare Phones
Search and select devices to compare
 vivo X21 UD |
 Samsung Galaxy S24 Ultra |
|
|---|---|---|
| Price (USD) | $550.00 | $507.90 |
| Network | ||
| Technology | GSM / CDMA / HSPA / LTE | GSM / CDMA / HSPA / EVDO / LTE / 5G |
| 2G bands | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G bands | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 |
| 4G bands | 1, 2, 3, 5, 8, 34, 38, 39, 40, 41 | 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 66 - International |
| Speed | HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps | HSPA, LTE (CA), 5G |
| 5G bands | - | 1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 38, 40, 41, 66, 75, 77, 78 SA/NSA/Sub6 - International |
| Launch | ||
| Announced | 2018, March. Released 2018, March | 2024, January 17 |
| Status | Discontinued | Available. Released 2024, January 24 |
| Body | ||
| Dimensions | 154.5 x 74.8 x 7.4 mm (6.08 x 2.94 x 0.29 in) | 162.3 x 79 x 8.6 mm (6.39 x 3.11 x 0.34 in) |
| Weight | 156.2 g (5.50 oz) | 232 g or 233 g (8.18 oz) |
| Build | Glass front (Gorilla Glass 3), aluminum back, aluminum frame | Glass front (Corning Gorilla Armor), glass back (Corning Gorilla Armor), titanium frame (grade 2) |
| SIM | Nano-SIM + Nano-SIM | · Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time) - INT · Nano-SIM + eSIM + eSIM (max 2 at a time) - USA · Nano-SIM + Nano-SIM - CN |
| Features | - | IP68 dust tight and water resistant (immersible up to 1.5m for 30 min) Stylus (Bluetooth integration, accelerometer, gyro) |
| Display | ||
| Type | Super AMOLED | Dynamic LTPO AMOLED 2X, 120Hz, HDR10+, 2600 nits (peak) |
| Size | 6.28 inches, 98.4 cm2 (~85.2% screen-to-body ratio) | 6.8 inches, 113.5 cm2 (~88.5% screen-to-body ratio) |
| Resolution | 1080 x 2280 pixels, 19:9 ratio (~402 ppi density) | 1440 x 3120 pixels, 19.5:9 ratio (~505 ppi density) |
| Protection | Corning Gorilla Glass 3 | Corning Gorilla Armor |
| Features | - | DX anti-reflective coating |
| Platform | ||
| OS | Android 8.1 (Oreo), Funtouch 4 | Android 14, up to 7 major OS updates, One UI 8.5 |
| Chipset | Qualcomm SDM660 Snapdragon 660 (14 nm) | Qualcomm SM8650-AC Snapdragon 8 Gen 3 (4 nm) |
| CPU | Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) | 8-core (1x3.39GHz Cortex-X4 & 3x3.1GHz Cortex-A720 & 2x2.9GHz Cortex-A720 & 2x2.2GHz Cortex-A520) |
| GPU | Adreno 512 | Adreno 750 (1 GHz) |
| Memory | ||
| Card slot | microSDXC (uses shared SIM slot) | No |
| Internal | 128GB 6GB RAM | 256GB 12GB RAM, 512GB 12GB RAM, 1TB 12GB RAM |
| Features | eMMC 5.1 | UFS 4.0 |
| Main Camera | ||
| Dual | 12 MP, f/1.8, 1/2.55", 1.4µm, dual pixel PDAF Auxiliary lens | - |
| Features | LED flash, HDR, panorama | Laser AF, LED flash, auto-HDR, panorama |
| Video | 1080p@30fps | 8K@24/30fps, 4K@30/60/120fps, 1080p@30/60/120/240fps, HDR10+, stereo sound rec., gyro-EIS |
| Quad | - | 200 MP, f/1.7, 24mm (wide), 1/1.3", 0.6µm, multi-directional PDAF, OIS 10 MP, f/2.4, 67mm (telephoto), 1/3.52", 1.12µm, PDAF, OIS, 3x optical zoom 50 MP, f/3.4, 111mm (periscope telephoto), 1/2.52", 0.7µm, PDAF, OIS, 5x optical zoom 12 MP, f/2.2, 13mm, 120˚ (ultrawide), 1/2.55", 1.4µm, dual pixel PDAF, Super Steady video |
| Selfie camera | ||
| Single | 12 MP, f/2.0, (wide), 1/2.8", 1.28µm | 12 MP, f/2.2, 26mm (wide), 1/3.2", 1.12µm, dual pixel PDAF |
| Video | 1080p@30fps | 4K@30/60fps, 1080p@30fps |
| Features | - | HDR, HDR10+ |
| Sound | ||
| Loudspeaker | Yes | Yes, with stereo speakers |
| 3.5mm jack | Yes | No |
| Features | 32-bit/192kHz Hi-Res audio | High-bitrate audio support |
| Comms | ||
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct | Wi-Fi 802.11 a/b/g/n/ac/6e/7, tri-band, Wi-Fi Direct |
| Bluetooth | 5.0, A2DP, LE | 5.3, A2DP, LE |
| Positioning | GPS, GLONASS | GPS, GLONASS, BDS, GALILEO, QZSS |
| NFC | No | Yes |
| Radio | FM radio | No |
| USB | microUSB 2.0, OTG | USB Type-C 3.2, DisplayPort 1.2, OTG |
| Features | ||
| Sensors | Fingerprint (under display, optical), accelerometer, proximity, compass | Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer |
| Features | - | Samsung DeX, Samsung Wireless DeX (desktop experience support) Ultra Wideband (UWB) support |
| Battery | ||
| Type | Li-Ion 3200 mAh, non-removable | Li-Ion 5000 mAh |
| Charging | 18W wired | 45W wired, PD3.0, 65% in 30 min 15W wireless (Qi) 4.5W reverse wireless |
| Misc | ||
| Colors | Black, Ruby Red | Titanium Black, Titanium Gray, Titanium Violet, Titanium Yellow, Titanium Blue, Titanium Green, Titanium Orange |
| Models | X21UD A | SM-S928B, SM-S928B/DS, SM-S928U, SM-S928U1, SM-S928W, SM-S928N, SM-S9280, SM-S928E, SM-S928E/DS |
| Price | About 550 EUR | $ 507.90 / € 573.22 / £ 494.00 / ₹ 104,999 |
| SAR | - | 1.26 W/kg (head) 0.62 W/kg (body) |
| SAR EU | - | 1.06 W/kg (head) 1.30 W/kg (body) |
| Our Tests | ||
| Performance | - | AnTuTu: 1453497 (v9), 1823822 (v10) GeekBench: 7076 (v6) 3DMark: 4983 (Wild Life Extreme) |
| Display | - | 1447 nits max brightness (measured) |
| Camera | - | Photo / Video |
| Loudspeaker | - | -24.6 LUFS (Very good) |
| Battery | - | Active use score 13:49h |
| — | Performance | Win |
| — | Display | Win |
| — | Camera | Win |
| — | Battery | Win |
| — | Charging | Win |
| Win | RAM | — |
| — | 5G | Win |
| — | Price | — |
- 3.5mm analog headphone jack for lag-free wired audio listening
- Limited to 4G LTE cellular data speeds without 5G support
- Screen refresh rate capped at 60Hz (less fluid than Galaxy S24 Ultra's 120Hz)
- Moderate processing ceiling compared to the high-performance chip in Galaxy S24 Ultra
- Future-proof 5G network connectivity (limited to 4G on X21 UD)
- Adaptive LTPO display technology optimizing power efficiency
- Fluid 120Hz refresh rate providing much smoother motion than X21 UD's 60Hz
- Higher-tier Qualcomm SM8650-AC Snapdragon 8 Gen 3 (4 nm) processor offering substantial compute superiority
- Dedicated telephoto optical zoom lens for crisp distant shots (missing on X21 UD)
- Lacks 3.5mm headphone jack (available on X21 UD)
In this in-depth comparative analysis, we place the vivo X21 UD directly against the Samsung Galaxy S24 Ultra to identify where each hardware architecture excels and which device delivers the smarter investment.
Processing horsepower tilts convincingly toward the Samsung Galaxy S24 Ultra, driven by its Qualcomm SM8650-AC Snapdragon 8 Gen 3 (4 nm). It outpaces the Qualcomm SDM660 Snapdragon 660 (14 nm) in the vivo X21 UD during resource-demanding workflows, offering greater headroom for complex gaming, video encoding, and rapid app switching.
Visual fidelity favors the Samsung Galaxy S24 Ultra, whose LTPO AMOLED display at 120Hz delivers enhanced sharpness, rich color depth, and fluid motion that outclasses the AMOLED screen found on the vivo X21 UD.
Imaging capabilities tilt toward the Samsung Galaxy S24 Ultra, highlighted by its 200MP primary camera with OIS stabilization and optical zoom capabilities. It produces crisper snapshots with lively color science and cleaner edge definition compared to the 12MP camera on the vivo X21 UD.
Longevity and replenishment turnaround favor the Samsung Galaxy S24 Ultra, whose 5000mAh battery and 45W charging provide faster top-ups and reliable stamina compared to the 3200mAh (18W) configuration of the vivo X21 UD.
Overall Verdict: The Samsung Galaxy S24 Ultra earns the victory in this head-to-head comparison with 6 category wins versus 1 for the vivo X21 UD. With decisive strengths in key hardware areas, the Samsung Galaxy S24 Ultra delivers greater overall capability and stronger value.
