Samsung Galaxy S8
Samsung Galaxy A51
Samsung Galaxy A21Samsung Galaxy S8 vs Samsung Galaxy A51 vs Samsung Galaxy A21
Price Comparison (India)
Rs. 57,900 
Rs. 25,250 General Info
| Manufacturer | ||
| Samsung | Samsung | Samsung |
| Announced | ||
| March 2017 | December 2019 | 2020, April 8 |
| Status | ||
| Available - April 2017 | Coming Soon - December 12, 2019 | Coming soon. Exp. release 2020, April |
| Price | ||
| Rs. 57,900 ($720.00) [Similarly Priced] | Rs. 23,999 ($0.00) [Similarly Priced] | - |
| Colors | ||
| Black, White, Gold, Silver, Pink Gold | Prism Crush White, Black, Pink, Blue | Various |
| Form Factor | ||
| Candybar | Candybar | Candybar |
| Dimension | ||
|
148.9 x 68.1 x 8 mm (5.86 x 2.68 x 0.31 in) |
158.4 x 73.7 x 7.9 mm (6.24 x 2.9 x 0.31 in) |
- |
| Weight | ||
| 155 g (5.47 oz) | 172 g (6.07 oz) | - |
| SIM Type | ||
| Dual-SIM | Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) | Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) |
| 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 - SIM 1 & SIM 2 (dual-SIM only) |
| 3G Network | ||
| HSDPA | HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 |
HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 1700(AWS) / 1900 / 2100 |
| 4G Network | ||
| LTE | LTE (unspecified) | LTE |
| Messaging | ||
| SMS, MMS, EMail, IM | ||
| Build Features | ||
| - | - Fingerprint Sensor(In-display) |
- Fingerprint Sensor Glass front, plastic back, plastic frame |
| Notification LED | ||
| Yes | - | - |
Hardware and OS
| OS | ||
| Android OS, v7.0 (Nougat) | Android 9.0 (Pie) | Android 10.0 |
| User Interface | ||
| - | One UI | One UI 2.0 |
| Processor | ||
| Octa-core (4x2.35 GHz Kryo & 4x1.9 GHz Kryo) Octa-core (4x2.3 GHz & 4x1.7 GHz), Qualcomm MSM8998 Snapdragon 835 Exynos 8895 Octa |
Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53), Exynos 9611 (10nm) | Octa-core (4x2.35 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53), Mediatek MT6765 Helio P35 (12nm) |
| GPU | ||
| Adreno 540 | Mali-G72 MP3 | PowerVR GE8320 |
| RAM | ||
| 4 GB | 8 GB | 3 GB |
| Internal Memory | ||
| 64 GB | 128 GB | 64 GB |
| External Memory | ||
| microSD, up to 256 GB (dedicated slot) | microSD, up to 512 GB (dedicated slot) | microSDXC (dedicated slot) |
Display
| Type | ||
| Super AMOLED capacitive touchscreen, Gorilla Glass 5 | Full HD+ Infinity-O Super AMOLED Capacitive Touchscreen | HD+ Super AMOLED Capacitive Touchscreen |
| Colors | ||
| 16M colors | 16M colors | 16M colors |
| Size | ||
| 5.8 inches | 6.5 inches | 6.5 inches |
| Resolution | ||
| 1440 x 2960 pixels (568 ppi) | 1080 x 2340 pixels (396 ppi) | 720 x 1600 pixels (270 ppi) |
| Screen-to-Body Ratio | ||
| 84.06% | 89.06% | - |
| Multi-Touch | ||
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Multimedia
| 3.5mm Jack | ||
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| Radio | ||
| No | FM radio | FM radio |
| Games | ||
| Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | ||
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Camera
| Rear Camera | ||
| 12 MP | 48 MP + 12 MP + 5 MP + 5 MP | 16 MP + 8 MP + 2 MP + 2 MP |
| Flash | ||
| Dual-LED (Dual Tone) | LED Flash | No |
| Features | ||
| Phase Detection Autofocus, OIS, f/1.7 aperture, Geo-tagging, Simultaneous 4K Video And 9MP Image Recording, Touch Focus, Face/smile Detection, Auto HDR, Panorama | 48 MP, f/1.8, (wide), 1/2", 0.8µm, PDAF 12 MP, f/2.2, 13mm (ultrawide) 5 MP, f/2.2, depth sensor 5 MP, f/2.4, macro camera Panorama, HDR |
16 MP, f/1.9, 28mm (wide), AF 8 MP, f/2.2, 12mm (ultrawide) 2 MP, (macro) 2 MP, (depth) panorama, HDR |
| Video | ||
| 2160p@60fps, 1080p@120fps, HDR, dual-video rec. | 2160p@30fps, 1080p@30fps | 1080p@30fps |
| Front Camera | ||
| 8 MP, AF | 32 MP, f/2.0, 25mm (wide) HDR 1080p@30fps |
13 MP HDR 1080p@30fps |
Connectivity and Data Rate
| GPRS | ||
| Yes | Yes | Yes |
| Edge | ||
| Yes | Yes | Yes |
| 3G | ||
| HSPA, LTE, VoLTE | HSPA, LTE-A | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps |
| Bluetooth | ||
| v4.2, A2DP, LE, aptX | 5.0, A2DP, LE | 5.0, A2DP, LE |
| Wi-Fi | ||
| Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | 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 |
| USB | ||
| v3.1, Type-C 1.0 reversible connector | 2.0, Type-C 1.0 reversible connector, USB On-The-Go | 2.0, Type-C 1.0 reversible connector, USB On-The-Go |
| GPS | ||
| Yes, with A-GPS, GLONASS, BDS | Yes, with A-GPS, GLONASS, GALILEO, BDS | Yes, with A-GPS, GLONASS, BDS |
| Browser | ||
| HTML5 | Yes | Yes |
User Memory
| Internal | ||
| 64 GB, 4 GB RAM | 128 GB, 8 GB RAM or 128 GB, 6 GB RAM or 64 GB, 4 GB RAM | 64 GB, 3 GB RAM eMMC 5.1 |
| Expandable Storage | ||
| microSD, up to 256 GB (dedicated slot) | microSD, up to 512 GB (dedicated slot) | microSDXC (dedicated slot) |
| USB OTG | ||
| Supported | Supported | Supported |
Sensors
| 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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| Heart-rate Sensor | ||
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| NFC | ||
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Battery
| Type | ||
| Non-removable Li-Ion battery | Non-removable Li-Po Battery Fast battery charging 15W |
Non-removable Li-Po Battery Fast battery charging 15W |
| Capacity | ||
| 3000 mAh | 4000 mAh | 4000 mAh |
| Stand by | ||
| - | - | - |
| Talk Time | ||
| - | - | - |
