Phone Comparison - Samsung Galaxy A31 vs Samsung Galaxy A21s vs Samsung Galaxy Z Fold3 5G
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| Manufacturer | Samsung | Samsung | Samsung |
| Announced | 2020, March 24 | Expected Announcement - May 2020 | 2021, August 11 |
| Status | Coming Soon - April 2020 | Rumored | Coming soon. Exp. release 2021, August 27 |
| Colors | Prism Crush Black, Prism Crush Blue, Prism Crush Red, Prism Crush White | Black, White, Blue | Black; other colors |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
159.3 x 73.1 x 8.6 mm (6.27 x 2.88 x 0.34 in) |
8.9 mm thickness (0.35 in thickness) |
Unfolded: 158.2 x 128.1 x 6.4 mm / Folded: 158.2 x 67.1 x 14.4-16 mm (Unfolded: 6.23 x 5.04 x 0.25 in / Folded: 6.23 x 2.64 x 0.57-0.63 in) |
| Weight | 185 g (6.53 oz) | 191 g (6.74 oz) | 271 g (9.56 oz) |
| SIM Type | Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) | Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) | Nano-SIM and/or eSIM |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) | GSM 850 / 900 / 1800 / 1900 CDMA2000 1xEV-DO |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100 |
| 4G Network | LTE (unspecified) | LTE | LTE 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 38, 39, 40, 41, 46, 48, 66, 71 |
| 5G Network | - | - | 2, 5, 25, 41, 66, 71, 260, 261 SA/NSA/Sub6/mmWave |
| Messaging | |||
| Build Features | - Fingerprint Sensor (under display, optical) |
- Fingerprint Sensor |
- Fingerprint Sensor (side-mounted) IPX8 water resistant (up to 1.5m for 30 mins) Stylus support Samsung DeX (desktop experience support) Samsung Pay (Visa, MasterCard certified) Ultra Wideband (UWB) support |
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| OS | Android 10.0 | Android 10.0 | Android 11 |
| User Interface | One UI 2.0 | One UI 2.0 | One UI 3.5 |
| Processor | Octa-core (2x2.0 GHz Cortex-A75 & 6x1.7 GHz Cortex-A55), Mediatek MT6768 Helio P65 (12nm) | Octa-core 2.0 GHz, Exynos 850 | Octa-core (1x2.84 GHz Kryo 680 & 3x2.42 GHz Kryo 680 & 4x1.80 GHz Kryo 680), Qualcomm SM8350 Snapdragon 888 5G (5 nm) |
| GPU | Mali-G52 MC2 | - | Adreno 660 |
| RAM | 6 GB | 3 GB | 12 GB |
| Internal Memory | 128 GB | 64 GB | 512 GB |
| External Memory | microSDXC | microSDXC | No |
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| Type | Super AMOLED Capacitive Touchscreen | PLS TFT Capacitive Touchscreen | Foldable Dynamic AMOLED 2X Screen 120Hz Refresh Rate HDR10+ Cover display: - 6.23 inches FHD+ Super AMOLED Screen, 816 x 2260 pixels, 25:9 ratio 120Hz Refresh Rate Corning Gorilla Glass Victus |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 6.4 inches | 6.55 inches | 7.6 inches |
| Resolution | 1080 x 2400 pixels (411 ppi) | 720 x 1600 pixels (268 ppi) | 1768 x 2208 pixels (372 ppi) |
| Screen-to-Body Ratio | 85.01% | - | 89.81% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | - | - | No |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 48 MP + 8 MP + 5 MP + 5 MP | 48 MP + 8 MP + 2 MP | 12 MP + 12 MP + 12 MP |
| Flash | LED flash | LED Flash | LED Flash |
| Features | 48 MP, f/2.0, (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 13mm (ultrawide), 1/4.0", 1.12µm 5 MP, f/2.4, (macro) 5 MP, f/2.4, (depth) panorama, HDR |
48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.4, (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (macro) Panorama, HDR |
12 MP, f/1.8, 26mm (wide), 1/1.76", 1.8µm, Dual Pixel PDAF, OIS 12 MP, f/2.4, 52mm (telephoto), 1/3.6", 1.0µm, PDAF, OIS, 2x optical zoom 12 MP, f/2.2, 123˚, 12mm (ultrawide), 1.12µm HDR, Panorama |
| Video | 1080p@30fps | 1080p@30fps | 4K@60fps, 1080p@60/240fps (gyro-EIS), 720p@960fps (gyro-EIS), HDR10+ |
| Front Camera |
20 MP, f/2.2, 0.8µm HDR 1080p@30fps [Similar] |
13 MP, f/2.3, 29mm (normal), 1/3.1", 1.12µm HDR, Panorama 1080p@30fps [Similar] |
16 MP, (wide), 1.0µm, under display Cover camera: 10 MP, f/2.2, 26mm (wide), 1/3", 1.22µm HDR 4K@30fps, 1080p@30fps, gyro-EIS [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSPA, LTE-A | HSPA 42.2/5.76 Mbps, LTE-A | HSPA 42.2/5.76 Mbps, LTE-A (7CA) Cat20 2000/200 Mbps, 5G |
| Bluetooth | 5.0, A2DP, LE | 5.0, A2DP, LE | 5.2, A2DP, LE, aptX HD |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot | Wi-Fi 802.11 a/b/g/n/ac/6e, dual-band, Wi-Fi Direct, hotspot |
| USB | 2.0, Type-C 1.0 reversible connector, USB On-The-Go | Yes | USB Type-C 3.2 |
| GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS | Yes, with A-GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS |
| Browser | Yes | Yes | Yes |
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| Internal | 128 GB, 6 GB RAM or 64 GB, 4 GB RAM (UFS 2.1) | 64 GB, 3 GB RAM or 32 GB, 3 GB RAM | 512 GB, 12 GB RAM or 256 GB, 12 GB RAM (UFS 3.1) |
| Expandable Storage | microSDXC | microSDXC | No |
| USB OTG | Supported | Supported | Supported |
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| Fingerprint | |
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| Proximity Sensor | |
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| Accelerometer Sensor | |
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| Magnetic-Field Sensor (Compass) | |
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| Gyroscope Sensor | |
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| Barometer Sensor | |
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| NFC | |
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| Type | Non-removable Li-Po Battery Fast battery charging 15W |
Non-removable Li-Po Battery Battery Charging 10W |
Non-removable Li-Po Battery Fast battery charging 25W Fast wireless charging 11W Reverse wireless charging 4.5W |
| Capacity | 5000 mAh | 5000 mAh | 4400 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
