| Physical features | Samsung Galaxy A21 |
| Model | |
| Other model names | Galaxy A21 SM-A215UZKAXAA (USA Unlocked) |
| Country or region available | 
USA |
| Brand | Samsung |
| Release date | June, 2020 |
| Depth | 8.1 millimeters (0.32 inches) |
| Size (width x height) | 76.7 x 167.8 millimeters (3.02 x 6.61 in) |
| Weight | 193 grams (6.76 ounces) |
| Qwerty physical keyboard | Not supported |
| Antenna | Internal antenna |
| Build, materials | Plastic body, glass front |
| Protection against water and others | Not supported |
| System (OS) | Samsung Galaxy A21 |
| Operating system | Android 10 |
| Firmware update | feature not registered |
| Hardware | Samsung Galaxy A21 |
| Chipset | 64bit - MediaTek MT6765 Helio P35 (12nm) |
| CPU processor | Octa-Core, 2 processors:
2.3Ghz Quad-Core ARM Cortex-A53
1.8Ghz Quad-Core ARM Cortex-A53 |
| GPU graphical controller | PowerVR GE8320 680Mhz |
| RAM memory | 3GB LPDDR3 |
| Internal storage | 32GB (20GB available)
eMMC 5.1 |
| External storage | Until 512GB microSD, microSDXC
(dedicated slot) |
| Display | Samsung Galaxy A21 |
| Display type | TFT PLS |
| Screen size | 6.5" inches |
| Screen-to-body ratio | ~79.3% (screen-to-body ratio) |
| Display resolution | 720x1600 pixels (20:9) |
| Touchscreen | Capacitive Multitouch |
| Pixel density (dot pitch) | 270 PPI |
| Colors | 16 million |
| Scratch-resistant glass | Not supported |
| Display features | 60Hz |
| Mobile networks | Samsung Galaxy A21 |
| Dual-SIM | Not supported |
| SIM card | 1 slot (Single-SIM)
nano-SIM (4FF) |
| Maximum download/upload | 150/50 Mbps |
| Network technology | 2G, 3G, 4G |
| Frequency, bands | Expand band detailsCollapse details |
| GSM Mhz band | Quad-Band 850/900/1800/1900 |
| Primary 2G network | CDMA 800/1900, GSM 850/900/1800/1900 |
| Primary 3G network | CDMA2000 1xEV-DO
UMTS 850/900/1700/1900/2100 |
| Primary 4G network | LTE Cat4 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 25, 26, 28, 66, 71)
TD-LTE (38, 39, 40, 41)
VoLTE |
| Primary 5G network | Not supported |
| Primary data network | GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE |
| Secondary 2G network | Not supported |
| Secondary 3G network | Not supported |
| Secondary 4G network | Not supported |
| Secondary data network | Not supported |
| Calling | Samsung Galaxy A21 |
| Messaging | SMS (T9), MMS, E-mail, Push mail |
| Speakerphone | Supported |
| Video calling | Supported |
| Call control | Voice dialing, Voice recorder, Voice commands |
| Camera | Samsung Galaxy A21 |
| Back camera (main camera) | (quad camera)
16 megapixels
8MP ultrawidef/2.21/4.0"1.12µm
2MP macrof/2.4
2MP depthf/2.4 |
| Main camera resolution | 4608x3456 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps |
| Flash | LED flash |
| Focal aperture | f/1.8 (aperture) |
| Focal length | feature not registered |
| Sensor size | 1/3.06" inches |
| Pixel size | 1µm pixel |
| Autofocus | PDAF: phase detection autofocus |
| Touch focus | Supported |
| Image stabilization | EIS: Digital stabilization |
| Zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection |
| BSI sensor | Not supported |
| HDR | HDR photo on both cameras |
| 2ª camera | Samsung Galaxy A21 |
| Front camera (secondary) | 13 megapixels |
| Front camera resolution | 4128x3096 pixels |
| Video recording (secondary) | Full HD (1920x1080) |
| Front flash | Not supported |
| Focal aperture | f/2.0 (aperture) |
| Focal length | feature not registered |
| Sensor size | feature not registered |
| Pixel size | 1.12µm pixel |
| Multimedia | Samsung Galaxy A21 |
| Radio | FM |
| TV | Not supported |
| Video formats | MP4, H.265, H.264, H.263, XviD, MKV |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC |
| Connectivity | Samsung Galaxy A21 |
| USB | USB 2.0 Type-C reversible connector |
| TV output | Not supported |
| Audio output | 3.5mm jack |
| Bluetooth | 5.0 + A2DP/LE |
| WiFi | 802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO |
| DLNA | Not supported |
| NFC | Supported |
| GPS | A-GPS, GeoTagging, GLONASS |
| Infrared port | Not supported |
| Other functions | Samsung Galaxy A21 |
| Active noise cancellation | Supported |
| Vibrating alert | Supported |
| Ringtones | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 |
| Sensors | Accelerometer
Proximity sensor
Compass
Ambient Light sensor
Gyroscope
Face unlock
Fingerprint sensor (rear-mounted)
|
| Other features | - Colors: Black
- One UI 2.0
- WiFi direct, hotspot |
| Power supply | Samsung Galaxy A21 |
| Battery | LiPo: Li-Ion polymer (Non removable) |
| Battery capacity | 4000 mAh |
| Charger, watts | 15W Fast battery charging |
| Talk time autonomy | feature not registered |
| Standby | feature not registered |
| Radiation rate | Samsung Galaxy A21 |
| SAR 1.6W/kg (USA, Mexico, etc.) | 0.6W/kg (head) | 1.27W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered |