vivo X21 vs vivo X21 UD
Side-by-side specs and price comparison for buyers in Algeria.
vivo X21
Price coming soon
vivo X21 UD
Price coming soon
Quick Verdict
Who wins each category, side by side.
Better price
Even
Faster chip
Even
Bigger battery
Even
Faster charging
Even
Higher-resolution camera
Even
Better display
Even
Lighter body
Even
Best value for money
Even
Full specs comparison
Display
| Spec | vivo X21 | vivo X21 UD |
|---|---|---|
| Size (inches) | 6.28 | 6.28 |
| Panel Type | AMOLED | AMOLED |
| Resolution Height | 2280 | 2280 |
| Resolution Width | 1080 | 1080 |
| PPI | 402 | 402 |
| Glass Type | Corning Gorilla Glass 3 | Corning Gorilla Glass 3 |
| Screen-to-body | 85.2 | 85.2 |
Platform
| Spec | vivo X21 | vivo X21 UD |
|---|---|---|
| CPU | Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) | Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) |
| GPU | Adreno 512 | Adreno 512 |
| Chipset Name | Snapdragon 660 | Snapdragon 660 |
| Process (nm) | 14 | 14 |
| OS Name | Android | Android |
| OS Version | 8.1 | 8.1 |
Memory
| Spec | vivo X21 | vivo X21 UD |
|---|---|---|
| Card Slot | microSDXC (uses shared SIM slot) | microSDXC (uses shared SIM slot) |
| Variants | 64GB 6GB RAM, 128GB 6GB RAM | 128GB 6GB RAM |
Main Camera
| Spec | vivo X21 | vivo X21 UD |
|---|---|---|
| Video | 1080p@30fps | 1080p@30fps |
| Features | LED flash, HDR, panorama | LED flash, HDR, panorama |
| Count | 2 | 2 |
| Depth | 5 MP, f/2.4, (depth) | 5 MP, f/2.4, (depth) |
| Lens | 12 MP, f/1.8 | 12 MP, f/1.8 |
Selfie Camera
| Spec | vivo X21 | vivo X21 UD |
|---|---|---|
| Video | 1080p@30fps | 1080p@30fps |
| Count | 1 | 1 |
| Lens | 12 MP, f/2, (wide) | 12 MP, f/2, (wide) |
Battery
| Spec | vivo X21 | vivo X21 UD |
|---|---|---|
| Capacity (mAh) | 3200 | 3200 |
| Chemistry | Li-Ion | Li-Ion |
| Wired Charging (W) | 18 | 18 |
Body
| Spec | vivo X21 | vivo X21 UD |
|---|---|---|
| Build | Glass front (Gorilla Glass 3), aluminum back, aluminum frame | Glass front (Gorilla Glass 3), aluminum back, aluminum frame |
| SIM | Nano-SIM + Nano-SIM | Nano-SIM + Nano-SIM |
| Height (mm) | 154.5 | 154.5 |
| Thickness (mm) | 7.4 | 7.4 |
| Weight (g) | 156.2 | 156.2 |
| Width (mm) | 74.8 | 74.8 |
Launch
| Spec | vivo X21 | vivo X21 UD |
|---|---|---|
| Announced | 2018, March. Released 2018, March | 2018, March. Released 2018, March |
| Status | Discontinued | Discontinued |
Network
| Spec | vivo X21 | vivo X21 UD |
|---|---|---|
| 2G Bands | GSM 850, 900, 1800, 1900 | GSM 850, 900, 1800, 1900 |
| 3G Bands | HSDPA 850, 900, 1900, 2100 | HSDPA 850, 900, 1900, 2100 |
| 4G Bands | 1, 2, 3, 5, 8, 34, 38, 39, 40, 41 | 1, 2, 3, 5, 8, 34, 38, 39, 40, 41 |
| Speed | HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps | HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps |
| Technology | GSM, CDMA, HSPA, LTE | GSM, CDMA, HSPA, LTE |
Connectivity
| Spec | vivo X21 | vivo X21 UD |
|---|---|---|
| Bluetooth | 5 | 5 |
| NFC | No | No |
| Positioning | GPS, GLONASS | GPS, GLONASS |
| Radio | FM radio | FM radio |
| USB Version | 2.0 | 2.0 |
| Wi-Fi | Wi-Fi 5 | Wi-Fi 5 |
Sound
| Spec | vivo X21 | vivo X21 UD |
|---|---|---|
| 3.5mm Jack | Yes | Yes |
| Loudspeaker | Yes | Yes |
Features
| Spec | vivo X21 | vivo X21 UD |
|---|---|---|
| Sensors | Fingerprint (rear-mounted), accelerometer, proximity, compass | Fingerprint (under display, optical), accelerometer, proximity, compass |
Buying advice for Algeria
Both vivo X21 and vivo X21 UD are sold in Algeria, but they fit different priorities.
Other popular comparisons
Samsung Galaxy S26 Ultra vs Apple iPhone 17 Pro Max
Samsung compared to Apple
Samsung Galaxy S26 Ultra vs Google Pixel 10 Pro XL
Samsung compared to Google
Samsung Galaxy S26 Ultra vs Xiaomi 15 Ultra
Samsung compared to Xiaomi
Apple iPhone 17 Pro Max vs Xiaomi 15 Ultra
Apple compared to Xiaomi
Apple iPhone 17 Pro Max vs Google Pixel 10 Pro XL
Apple compared to Google
Samsung Galaxy S26+ vs Apple iPhone 17
Samsung compared to Apple