| Physical features | Samsung Galaxy A21s (SM-A217F/DSN 64GB/6GB) | Blu Vivo Air LTE |
| Model | Galaxy A21s (SM-A217F/DSN 64GB/6GB) | Vivo Air LTE |
| Other model names | Galaxy A21s SM-A217F/Dual-Sim NFC (64GB + 6GB RAM) | Blu Vivo Air 4G LTE V0000UU, Blu Vivo Air V0000UU |
| Country or region available | 
Hong Kong |  
(Latin America), USA |
| Brand | Samsung | Blu |
| Release date | June, 2020 | September, 2015 |
| Depth | 8.9 millimeters (0.35 inches) | 5.15 millimeters (0.2 inches) |
| Size (width x height) | 75.3 x 163.7 millimeters (2.96 x 6.44 in) | 68.1 x 141.8 millimeters (2.68 x 5.58 in) |
| Weight | 192 grams (6.72 ounces) | 98 grams (3.43 ounces) |
| Qwerty physical keyboard | Not supported | Not supported |
| Antenna | Internal antenna | Internal antenna |
| Build, materials | Plastic body, glass front | Aluminum frame, glass front/back |
| Protection against water and others | Not supported | Not supported |
| System (OS) | Samsung Galaxy A21s (SM-A217F/DSN 64GB/6GB) | Blu Vivo Air LTE |
| Operating system | Android 10 | Android 5.0.2 Lollipop |
| Firmware update | feature not registered | feature not registered |
| Hardware | Samsung Galaxy A21s (SM-A217F/DSN 64GB/6GB) | Blu Vivo Air LTE |
| Chipset | 64bit - Samsung Exynos 850 Octa (8nm) | 64bit - Qualcomm Snapdragon 410 MSM8916 (28nm) |
| CPU processor | Octa-Core, 2 processors:
2Ghz Quad-Core ARM Cortex-A55
2Ghz Quad-Core ARM Cortex-A55 | 1.2Ghz Quad-Core ARM Cortex-A53 |
| GPU graphical controller | ARM Mali-G52 MP1 | Qualcomm Adreno 306 450Mhz |
| RAM memory | 6GB LPDDR4X | 2GB LPDDR3 |
| Internal storage | 64GB (48GB available)
eMMC 5.1 | 16GB (12GB available)
eMMC 4.5 |
| External storage | Until 512GB microSD, microSDXC
(dedicated slot) | Not supported |
| Display | Samsung Galaxy A21s (SM-A217F/DSN 64GB/6GB) | Blu Vivo Air LTE |
| Display type | TFT PLS | AMOLED |
| Screen size | 6.5" inches | 4.8" inches |
| Screen-to-body ratio | ~82.8% (screen-to-body ratio) | ~65.8% (screen-to-body ratio) |
| Display resolution | 720x1600 pixels (20:9) | 720x1280 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 270 PPI | 306 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Not supported | Gorilla Glass 3 |
| Display features | 60Hz | feature not registered |
| Mobile networks | Samsung Galaxy A21s (SM-A217F/DSN 64GB/6GB) | Blu Vivo Air LTE |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card
(dedicated slot) | Not supported |
| SIM card | 2 slots (Dual-SIM)
nano-SIM (4FF) | 1 slot (Single-SIM)
nano-SIM (4FF) |
| Maximum download/upload | 300/150 Mbps | 150/50 Mbps |
| Network technology | 2G, 3G, 4G | 2G, 3G, 4G |
| Frequency, bands | Expand band detailsCollapse details |
| GSM Mhz band | Quad-Band 850/900/1800/1900 | Quad-Band 850/900/1800/1900 |
| Primary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 850/900/1900/2100 | UMTS 850/1700/1900/2100 |
| Primary 4G network | LTE Cat7/13 (1, 2, 3, 5, 7, 8, 20, 28)
TD-LTE (38, 40, 41) | LTE Cat4 (Bands 2, 4, 7) |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE |
| Secondary 2G network | GSM 850/900/1800/1900 | Not supported |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | GPRS, EDGE | Not supported |
| Calling | Samsung Galaxy A21s (SM-A217F/DSN 64GB/6GB) | Blu Vivo Air LTE |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (T9), MMS, E-mail, Push mail |
| Speakerphone | Supported | Supported |
| Video calling | Supported | Supported |
| Call control | Voice dialing, Voice recorder, Voice commands | Voice dialing, Voice recorder |
| Camera | Samsung Galaxy A21s (SM-A217F/DSN 64GB/6GB) | Blu Vivo Air LTE |
| Back camera (main camera) | (quad camera)
48 megapixels
8MP ultrawidef/2.21/4"1.12µm123º
2MP macrof/2.4
2MP depthf/2.4 | 8 megapixels |
| Main camera resolution | 8000x6000 pixels | 3264x2448 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps | Full HD (1920x1080) 30 fps |
| Flash | LED flash | LED flash |
| Focal aperture | f/2.0 (aperture) | f/2.4 (aperture) |
| Focal length | 26mm lens | feature not registered |
| Sensor size | 1/2" inches | feature not registered |
| Pixel size | 0.8µm pixel | feature not registered |
| Autofocus | PDAF: phase detection autofocus | Autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | EIS: Digital stabilization | EIS: Digital stabilization |
| Zoom | Only digital zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
| BSI sensor | Not supported | Not supported |
| HDR | HDR photo on both cameras | HDR photo only main camera |
| 2ª camera | Samsung Galaxy A21s (SM-A217F/DSN 64GB/6GB) | Blu Vivo Air LTE |
| Front camera (secondary) | 13 megapixels | 5 megapixels |
| Front camera resolution | 4128x3096 pixels | 2592x1944 pixels |
| Video recording (secondary) | Full HD (1920x1080) | HD (1280x720) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.2 (aperture) | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | 1/3.1" inches | feature not registered |
| Pixel size | 1.12µm pixel | feature not registered |
| Multimedia | Samsung Galaxy A21s (SM-A217F/DSN 64GB/6GB) | Blu Vivo Air LTE |
| Radio | FM | FM |
| TV | Not supported | Not supported |
| Video formats | MP4, H.265, H.264, H.263, XviD, MKV | MP4, H.264, H.263 |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, eAAC+ |
| Connectivity | Samsung Galaxy A21s (SM-A217F/DSN 64GB/6GB) | Blu Vivo Air LTE |
| USB | USB 2.0 Type-C reversible connector | MicroUSB 2.0 |
| TV output | Not supported | Not supported |
| Audio output | 3.5mm jack | 3.5mm jack |
| Bluetooth | 5.0 + A2DP/LE | 4.0 + A2DP |
| WiFi | 802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO | 802.11 b/g/n (2.4Ghz) |
| DLNA | Not supported | Not supported |
| NFC | Supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou | A-GPS, GeoTagging |
| Infrared port | Not supported | Not supported |
| Other functions | Samsung Galaxy A21s (SM-A217F/DSN 64GB/6GB) | Blu Vivo Air LTE |
| Active noise cancellation | Supported | Supported |
| Vibrating alert | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 | HTML, XHTML, HTML5 |
| Sensors | Accelerometer
Proximity sensor
Compass
Gyroscope
Face unlock
Fingerprint sensor (rear-mounted)
| Accelerometer
Proximity sensor
Compass
Ambient Light sensor
|
| Other features | - Colors: Black, White, Blue, Red
- One UI 2.0
- WiFi direct, hotspot | - Colors: Black, White
- Gorilla Glass 3 on both sides of the phone
- Sony IMX-219 sensor on back camera
- DTS surround audio
- WiFi hotspot |
| Power supply | Samsung Galaxy A21s (SM-A217F/DSN 64GB/6GB) | Blu Vivo Air LTE |
| Battery | LiPo: Li-Ion polymer (Non removable) | LiPo: Li-Ion polymer (Non removable) |
| Battery capacity | 5000 mAh | 2050 mAh |
| Charger, watts | 15W (9V/1.67A) Fast battery charging | Standard charging |
| Talk time autonomy | feature not registered | 660 minutes | 11 hours | 0.5 day |
| Standby | feature not registered | 39000 minutes | 650 hours | 27.1 days |
| Radiation rate | Samsung Galaxy A21s (SM-A217F/DSN 64GB/6GB) | Blu Vivo Air LTE |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | 0.422W/kg (head) | 1.544W/kg (body) | feature not registered |