vivo X21 vs OPPO A55 Specs Comparison
Compare mobile phone specifications of up to three devices at once. Our specs comparison tool helps you find and compare the perfect phone for your needs.
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| vivo X21 | OPPO A55 |
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Released
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May 29, 2018
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Released
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Oct 01, 2021
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6.3-inch · 2280x1080px
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6.5-inch · 1600x720px
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Dual camera
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Triple camera
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6GB · 128GB
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4GB · 64GB
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3200 mAh
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5000 mAh
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| Check prices |
Availability
| Officially announced | |
|---|---|
| Oct 01, 2021 | |
Design
| Dimensions | |
|---|---|
| 6.08 x 2.94 x 0.29 inches 154.45 x 74.78 x 7.37 mm |
6.44 x 2.98 x 0.33 inches 163.6 x 75.7 x 8.4 mm (~9 mm with camera bump) |
| Weight | |
| 5.51 oz / 156.2 g | |
| Materials | |
| Back: Aluminum Frame: Aluminum |
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| Resistance | |
| Splash | |
| Biometrics | |
| 2D Face unlock, Optical in-screen fingerprint | Fingerprint (touch) |
| Keys | |
| Right: Volume control, Lock/Unlock key | Left: Volume control; Right: Lock/Unlock key |
| Colors | |
| Black | Rainbow Blue, Starry Black, Green |
Display
| Size | |
|---|---|
| 6.3-inch, 85.36% screen-to-body | 6.5-inch, 82.64% screen-to-body |
| Type | |
| Super AMOLED | IPS LCD, 550 nits |
| Resolution | |
| 2280x1080px, 402 PPI | 1600x720px, 20:9 ratio, 270 PPI |
| Protection | |
| NEG Dinorex | |
Hardware
| System chip | |
|---|---|
| Snapdragon 660 SDM660 (14 nm) | Mediatek Helio G35 MT6765G (12 nm) |
| Processor | |
| Octa-core 2200 MHz Kryo 260 |
Octa-core 2300 MHz |
| GPU | |
| Adreno 512 | PowerVR GE8320 |
| Memory | |
| 6GB (LPDDR4)/128GB | 4GB/64GB 4GB/128GB 6GB/128GB |
| Storage expansion | |
| microSDXC up to 256 GB | microSDXC |
| OS | |
| Android (8.1 Oreo) | Android (11) |
Battery
| Type | |
|---|---|
| 3200 mAh, Li - Ion | 5000 mAh |
| Charging | |
| Fast charging | Fast charging |
| Charge speed | |
| Wired: 18.0W | |
Camera
| Rear | |
|---|---|
| Dual camera | Triple camera |
| Main camera | |
| 12 MP (PDAF) Aperture size: F1.8 Sensor size: 1/2.8" Pixel size: 1.28 μm |
50 MP (PDAF) Aperture size: F1.8 Focal length: 26 mm |
| Second camera | |
| 5 MP (Depth information) Aperture size: F2.4 |
2 MP (Macro) |
| Third camera | |
| 2 MP (Depth information) | |
| Flash | |
| LED | LED |
| Video recording | |
| 1080p (30 fps) Time-lapse video, Video calling, Video sharing |
Yes |
| Front | |
| 12 MP Video capture: 1080p |
16 MP |
Connectivity & Features
| Bluetooth | |
|---|---|
| 5.0 | 5.0 |
| WLAN | |
| a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac | a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac |
| USB | |
| microUSB, USB 2.0 | Type-C, USB 2.0 |
| Sensors | |
| Accelerometer, Gyroscope, Compass, Ambient light sensor, Proximity sensor | Accelerometer, Compass, Ambient light sensor, Proximity sensor |
| Location | |
| GPS, A-GPS, Glonass | GPS, A-GPS, Glonass, Galileo, BeiDou, QZSS, Cell ID, Wi-Fi positioning |
| Other | |
| VoIP, Tethering, Computer sync, OTA sync | NFC |
Multimedia
| Headphones | |
|---|---|
| 3.5mm jack | 3.5mm jack |
| Speakers | |
| Earpiece, Loudspeaker | Earpiece, Loudspeaker |
| Features | |
| Album art cover, Background playback | |
| Screen mirroring | |
| Wireless screen share | Wireless screen share |
| Radio | |
| FM | |
| Additional microphone(s) | |
| Noise cancellation | Noise cancellation |
Cellular
| 4G (FDD) Bands | |
|---|---|
| 1, 3, 5 | 1, 3, 5, 8 |
| 4G (TDD) Bands | |
| 40, 41 | 38, 40, 41 |
| 3G Bands | |
| 5, 8, 1 | 1, 5, 8 |
| Data Speed | |
| LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s | LTE-A, HSDPA+ (4G) 42.2 Mbit/s |
| Dual SIM | |
| Yes | |
| SIM type | |
| Nano SIM | Dual Nano SIM |
Regulatory Approval
| Measured SAR | |
|---|---|
| Head: 1.18 W/kg Body: 0.57 W/kg |
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Alternative variants
With 128GB internal storage
| Memory | 128GB |
|---|---|
With ^GB RAM and 128GB internal storage
| Memory | 6GB/128GB |
|---|---|
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