Phone Comparison - Google Pixel 4a vs Samsung Galaxy S21 5G vs Asus Zenfone 8
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| Manufacturer | Samsung | Asus | |
| Announced | 2020, August 03 | 2021, January 14 | 2021, May 12 |
| Status | Coming soon. Exp. release 2020, August 20 | Coming soon. Exp. release 2021, January 29 | Available. Released 2021, May 13 |
| Price | - | Rs. 69,999 ($799.99) [Similarly Priced] | - |
| Colors | Just Black | Phantom Gray, Phantom White, Phantom Violet, Phantom Pink | Obsidian Black, Horizon Silver |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
144 x 69.4 x 8.2 mm (5.67 x 2.73 x 0.32 in) |
151.7 x 71.2 x 7.9 mm (5.97 x 2.8 x 0.31 in) |
148 x 68.5 x 8.9 mm (5.83 x 2.7 x 0.35 in) |
| Weight | 143 g (5.04 oz) | 169 g (5.96 oz) | 169 g (5.96 oz) |
| SIM Type | Dual SIM (Nano-SIM, dual stand-by) | Single SIM (Nano-SIM and/or eSIM), Hybrid Dual SIM (Nano-SIM, dual stand-by) | Dual SIM (Nano-SIM, dual stand-by) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (Dual SIM model only) CDMA2000 1xEV-DO |
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100 |
| 4G Network | LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 18(800), 19(800), 20(800), 25(1900), 26(850), 28(700), 32(1500), 38(2600), 39(1900), 40(2300), 41(2500), 66(1700/2100) | LTE | LTE |
| 5G Network | - | SA/NSA/Sub6/mmWave | SA/NSA |
| Messaging | |||
| Build Features | - Fingerprint Sensor |
- Fingerprint Sensor (under display, ultrasonic) Samsung Pay (Visa, MasterCard certified) IP68 dust/water resistant (up to 1.5m for 30 mins) Samsung DeX, Samsung Wireless DeX (desktop experience support) ANT+ |
- Fingerprint Sensor |
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| OS | Android 10.0 | Android 11 | Android 11 |
| User Interface | - | One UI 3.1 | ZenUI 8 |
| Processor | Octa-core (2x2.2 GHz Kryo 470 Gold & 6x1.8 GHz Kryo 470 Silver), Qualcomm SDM730 Snapdragon 730 (8 nm) | Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International / Octa-core (1x2.84 GHz Kryo 680 & 3x2.42 GHz Kryo 680 & 4x1.80 GHz Kryo 680 - USA/China/Korea, Exynos 2100 - International / Qualcomm Snapdragon 888 - USA/China/Korea | 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 | Adreno 618 | Mali-G78 MP14 - International / Adreno 660 - USA/China/Korea | Adreno 660 |
| RAM | 6GB | 8 GB | 16 GB |
| Internal Memory | 128 GB | 256 GB | 256 GB |
| External Memory | No | microSDXC (uses shared SIM slot) | microSDXC (dedicated slot) |
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| Type | IPS LCD Capacitive Touchscreen | FHD+ Dynamic AMOLED 2X Display 120Hz Refresh Rate HDR10+ 1300 nits (peak) Corning Gorilla Glass Victus Always-on display |
FHD+ Super AMOLED Screen 120Hz Refresh Rate HDR10+ 1100 nits (peak) |
| Colors | 16M colors | 16M Colour | 16M colors |
| Size | 5.81 inches | 6.2 inches | 5.9 inches |
| Resolution | 1080 x 2340 pixels (444 ppi) | 1080 x 2400 pixels (424 ppi) | 1080 x 2400 pixels (446 ppi) |
| Screen-to-Body Ratio | 82.76% | 86.12% | 82.92% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | - | FM radio (Snapdragon model only; market/operator dependent) | No |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 12.2 MP | 12 MP + 64 MP + 12 MP | 64 MP + 12 MP |
| Flash | LED Flash | LED Flash | LED Flash |
| Features | 12.2 MP, f/1.7, 27mm (wide), 1/2.55", 1.4µm, dual pixel PDAF, OIS Auto-HDR, Panorama |
12 MP, f/1.8, 26mm (wide), 1/1.76", 1.8µm, Dual Pixel PDAF, OIS 64 MP, f/2.0, 29mm (telephoto), 1/1.72", 0.8µm, PDAF, OIS, 1.1x optical zoom, 3x hybrid zoom 12 MP, f/2.2, 13mm (ultrawide), 1.4µm, Super Steady video Auto-HDR, Panorama |
64 MP, f/1.8, 26mm (wide), 1/1.73", 0.8µm, PDAF, OIS 12 MP, f/2.2, 112˚, 14mm (ultrawide), 1/2.55", 1.4µm, dual pixel PDAF HDR, Panorama |
| Video | 2160p@30fps, 1080p@30fps; gyro-EIS | 8K@24/30fps, 4K@30/60fps, 1080p@30/60/240fps, 720p@960fps, HDR10+, stereo sound rec., gyro-EIS & OIS | 8K@30fps, 4K@30/60/120fps, 1080p@30/60/240fps, 720p@480fps; gyro-EIS, HDR |
| Front Camera |
8 MP, f/2.0, (wide), 1/4", 1.12µm HDR 1080p@30fps [Similar] |
10 MP, f/2.2, 26mm (wide), 1/3.2", 1.22µm, Dual Pixel PDAF, Dual video call, Auto-HDR, 4K@30/60fps, 1080p@30fps [Similar] | 12 MP, f/2.5, 28mm (standard), 1/2.93", 1.22µm, dual pixel PDAF Video 4K@30fps, 1080p@30/60fps [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSPA 42.2/5.76 Mbps, LTE-A | HSPA 42.2/5.76 Mbps, LTE-A (CA), 5G | HSPA 42.2/5.76 Mbps, LTE-A (CA) |
| Bluetooth | 5.1, A2DP, LE | 5.0, A2DP, LE | 5.0, A2DP, LE, aptX Adaptive |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA, hotspot | Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, hotspot | Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, hotspot |
| USB | 3.1, Type-C 1.0 reversible connector | USB Type-C 3.2, USB On-The-Go | USB Type-C |
| GPS | Yes, with A-GPS, GLONASS, BDS, GALILEO | Yes, with A-GPS, GLONASS, BDS, GALILEO | Yes, with dual-band A-GPS, GLONASS, GALILEO, BDS, QZSS, NavIC |
| Browser | Yes | Yes | Yes |
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| Internal | 128 GB, 6GB RAM (UFS 2.1) | 256 GB, 8 GB RAM or 128 GB, 8 GB RAM UFS 3.1 | 256 GB, 16 GB RAM or 256 GB, 8 GB RAM or 128 GB, 8 GB RAM or 128 GB, 6 GB RAM |
| Expandable Storage | No | microSDXC (uses shared SIM slot) | microSDXC (dedicated slot) |
| 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 18W |
Non-removable Li-Po Battery Fast battery charging 25W USB Power Delivery 3.0 Fast Qi/PMA wireless charging 15W Power bank/Reverse wireless charging 4.5W |
Non-removable Li-Po Battery Fast battery charging 30W USB Power Delivery 3.0 Reverse charging |
| Capacity | 3140 mAh | 4000 mAh | 4000 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
