Samsung Galaxy A21 (SM-A215U1) vs Asus Zenfone 7 (ZS670KS 128GB/8GB)
Side by side comparison between Samsung Galaxy A21 vs Asus Zenfone 7 phones, differences, pros, cons and full specifications. What's the better?
,
6.5"
PLS
PLS
720x1600
16
MP
MP
13mp
3GB
RAM
RAM
Octa-core
4000
mAh
mAh
(Non removable)
vs
6.67"
AMOLED
AMOLED
1080x2400
64
MP
MP
64mp
8GB
RAM
RAM
Octa-core
5000
mAh
mAh
(Non removable)
What's the better phone? Asus Zenfone 7 (ZS670KS 128GB/8GB)
The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!
4 Advantages 
28 Advantages | 24 Common items in both devices |
| Until 512GB microSD, microSDXC / Until 1TB microSD, microSDXC |
| 16 million |
| PDAF: phase detection autofocus |
| EIS: Digital stabilization |
| HDR photo on both cameras / HDR photo/video on both cameras |
| f/1.8 (aperture) |
| Capacitive |
| +17 specs and more in the table below |
Check the comparison table below for more items that are not evaluated in comparison score above.
Highlight differences Clear highlight📱 Model features | ||
| Galaxy A21 (SM-A215U1) | Asus Zenfone 7 (ZS670KS 128GB/8GB) | |
| Model | Galaxy A21 (SM-A215U1) | Zenfone 7 (ZS670KS 128GB/8GB) |
| Other model names | Galaxy A21 SM-A215UZKAXAA (USA Unlocked) | Asus Zenfone 7 ZS670KS, ASUS_I002D, I002D (8GB RAM) |
| Country or region available |  USA |  (Global, International) |
| Brand | Samsung | Asus |
| Release date | 6/26/2020 | 9/1/2020, Announced: 8/26/2020 |
| Depth | 8.1 millimeters (0.32 inches) | 9.6 millimeters (0.38 inches) |
| Size (width x height) | 76.7 x 167.8 millimeters (3.02 x 6.61 in) | 77.3 x 165.1 millimeters (3.04 x 6.5 in) |
| Weight | 193 grams (6.76 ounces) | 235 grams (8.23 ounces) |
| Build, materials | Plastic body, glass front | Aluminum frame, glass front/back |
| Protection against water and others | Not supported | Not supported |
📲 Display | ||
| Galaxy A21 (SM-A215U1) | Asus Zenfone 7 (ZS670KS 128GB/8GB) | |
| Display type | TFT PLS | Super AMOLED |
| Screen size | 6.5" inches | 6.67" inches |
| Screen-to-body ratio | ~79.3% (screen-to-body ratio) | ~84.2% (screen-to-body ratio) |
| Display resolution | 720x1600 pixels (20:9) | 1080x2400 pixels (20:9) |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch 10-points |
| Pixel density (dot pitch) | 270 PPI | 395 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Not supported | Gorilla Glass 6 |
| Refresh rate | 60Hz | 90Hz |
| Display features | Not supported | 700nits[peak] HDR10+ |
🤖 Operating System | ||
| Galaxy A21 (SM-A215U1) | Asus Zenfone 7 (ZS670KS 128GB/8GB) | |
| System version | Android 10 | Android 10 |
| Firmware update | feature not registered | Android 12 |
| User Interface | feature not registered | ZenUI 8 |
⚙️ Processor | ||
| Galaxy A21 (SM-A215U1) | Asus Zenfone 7 (ZS670KS 128GB/8GB) | |
| Chipset | 64bit: MediaTek Helio P35 (MT6765) (12nm) | 64bit: Qualcomm Snapdragon 865 (SM8250) (7nm) |
| CPU | Octa-core, 2 processors: 4x 2.3GHz ARM Cortex-A53 (Quad-core) 4x 1.8GHz ARM Cortex-A53 (Quad-core) | Octa-core, 3 processors: 1x 2.84GHz Kryo 585 (Single-core) 3x 2.42GHz Kryo 585 (Triple-core) 4x 1.8GHz Kryo 585 (Quad-core) |
| GPU graphical controller | PowerVR GE8320 MP2 (680MHz) | Qualcomm Adreno 650 (250-587MHz) |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Galaxy A21 (SM-A215U1) | Asus Zenfone 7 (ZS670KS 128GB/8GB) | |
| RAM memory | 3GB LPDDR3 | 8GB LPDDR5 |
| Internal storage | 32GB (20GB available) eMMC 5.1 | 128GB (104GB available) UFS 3.1 |
| External storage | Until 512GB microSD, microSDXC (dedicated slot) | Until 1TB microSD, microSDXC (dedicated slot) |
📶 Mobile networks | ||
| Galaxy A21 (SM-A215U1) | Asus Zenfone 7 (ZS670KS 128GB/8GB) | |
| Dual-SIM | Not supported | Dual-SIM Standby - Call active on one sim card (dedicated slot) |
| SIM card | 1 slot (Single-SIM) nano-SIM (4FF) | 2 slots (Dual-SIM) nano-SIM (4FF) |
| Maximum Download / Upload | 150/50 Mbps | 2000/1024 Mbps |
| Network technology | 2G, 3G, 4G | 2G, 3G, 4G, 5G |
| Frequency, bands | Expand band details Collapse details | |
| GSM MHz band | Quad-Band 850/900/1800/1900 | Quad-Band 850/900/1800/1900 |
| Primary 2G network | CDMA 800/1900, GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Primary 3G network | CDMA2000 1xEV-DO UMTS 850/900/1700/1900/2100 | UMTS 800/850/900/1700/1900/2100 |
| 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 | LTE Cat19 (1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 29) TD-LTE (38, 39, 40, 41) VoLTE |
| Primary 5G network | Not supported | SA/NSA (1, 2, 3, 5, 7, 8, 12, 20, 28, 38, 77, 78) |
| Primary data network | GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA |
| Secondary 2G network | Not supported | GSM 850/900/1800/1900 |
| Secondary 3G network | Not supported | UMTS 800/850/900/1700/1900/2100 |
| Secondary 4G network | Not supported | LTE Cat19 (1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 29) TD-LTE (38, 39, 40, 41) VoLTE |
| Secondary data network | Not supported | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A |
📷 Camera | ||
| Galaxy A21 (SM-A215U1) | Asus Zenfone 7 (ZS670KS 128GB/8GB) | |
| Back camera (main camera) | (quad camera) 16 megapixels 8MP ultrawide f/2.21/4.0"1.12µm 2MP macro f/2.4 2MP depth f/2.4 | (triple camera) 64 megapixels 12MP ultrawide f/2.2113°17mm1/2.55"1.4µmPDAF 8MP telephoto f/2.480mmPDAF3x-optical-zoom |
| Main camera resolution | 4608x3456 pixels | 10120x6328 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps | 8K UHD (7680x4320) 30 fps |
| Flash | LED flash | Dual-LED flash |
| Focal aperture | f/1.8 (aperture) | f/1.8 (aperture) |
| Focal length | feature not registered | 26mm (lens) |
| Sensor size | 1/3.06" inches | 1/1.72" inches |
| Pixel size | 1µm pixel | 0.8µm pixel |
| Autofocus | PDAF: phase detection autofocus | PDAF: phase detection autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | EIS: Digital stabilization | EIS: Digital stabilization |
| Zoom | Only digital zoom | Digital and optical zoom |
| Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
| BSI sensor | Not supported | Supported |
| HDR | HDR photo on both cameras | HDR photo/video on both cameras |
| Camera extras | feature not registered | 4K@120fps 1080p@240fps 720p@480fps |
📸 Front camera | ||
| Galaxy A21 (SM-A215U1) | Asus Zenfone 7 (ZS670KS 128GB/8GB) | |
| Front camera (secondary) | 13 megapixels | Uses the back motorized camera (flip-up/rotating) |
| Front camera resolution | 4128x3096 pixels | 10120x6328 pixels |
| Video recording (secondary) | Full HD (1920x1080) | 8K UHD (7680x4320) |
| Front flash | Not supported | Dual-LED flash |
| Focal aperture | f/2.0 (aperture) | f/1.8 (aperture) |
| Focal length | feature not registered | 26mm (lens) |
| Sensor size | feature not registered | 1/1.72" inches |
| Pixel size | 1.12µm pixel | 0.8µm pixel |
🔉 Sound and multimedia | ||
| Galaxy A21 (SM-A215U1) | Asus Zenfone 7 (ZS670KS 128GB/8GB) | |
| Loudspeaker | Supported | Stereo sound 24-bit/192kHz |
| Active noise cancellation | 2 microphones or more | 2 microphones or more |
| Radio | FM | Not supported |
| TV | Not supported | Not supported |
| Video formats | MP4, H.265, H.264, H.263, XviD, MKV | MP4, H.265, H.264, H.263, XviD, MKV |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, WMA, eAAC+, FLAC |
🔌 Connectivity | ||
| Galaxy A21 (SM-A215U1) | Asus Zenfone 7 (ZS670KS 128GB/8GB) | |
| USB | USB 2.0 Type-C reversible connector | USB 2.0 Type-C, USB OTG On-The-Go |
| Audio output | 3.5mm jack | Type-C jack with 3.5mm jack adapter |
| TV output | Not supported | USB Type-C (reversible) |
| Bluetooth | 5.0 + A2DP/LE | 5.1 + A2DP/LE |
| WiFi | 802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot | 802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot |
| DLNA | Not supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, QZSS, NavIC |
| NFC | Supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Galaxy A21 (SM-A215U1) | Asus Zenfone 7 (ZS670KS 128GB/8GB) | |
| Sensors | Accelerometer Ambient light sensor Compass Face unlock 2D Fingerprint sensor (rear-mounted) Gyroscope Proximity sensor | Accelerometer Ambient light sensor Compass Face unlock 2D Fingerprint sensor (side-mounted) Gyroscope Hall effect Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Galaxy A21 (SM-A215U1) | Asus Zenfone 7 (ZS670KS 128GB/8GB) | |
| Battery type | LiPo: li-ion polymer (Non removable) | LiPo: li-ion polymer (Non removable) |
| Battery capacity | 4000 mAh | 5000 mAh |
| Charger, watts | 15W Wired fast charging | 30W Wired fast charging Reverse charging by cable Quick Charge 4 USB Power Delivery 3.0 |
| Inductive / wireless charging | Not supported | Not supported |
| Talk time autonomy | feature not registered | feature not registered |
| Standby | feature not registered | feature not registered |
➕ Other features | ||
| Galaxy A21 (SM-A215U1) | Asus Zenfone 7 (ZS670KS 128GB/8GB) | |
| Call control | Voice dialing, Voice recorder, Voice commands | Voice dialing, Voice recorder, Voice commands |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (T9), MMS, E-mail, Push mail |
| Hands-free calling | Supported | Supported |
| Video calling | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 | HTML, XHTML, HTML5 |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: Black • One UI 2.0 | • Colors: Aurora Black, Pastel White • Silicon case included |
☢️ Radiation rate | ||
| Galaxy A21 (SM-A215U1) | Asus Zenfone 7 (ZS670KS 128GB/8GB) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | 0.6W/kg (head), 1.27W/kg (body) | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |