Phone Comparison - Samsung Galaxy A02 vs vivo Y20 2021 vs Realme C21
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| Price Comparison (India) | - | - | |
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| Manufacturer | Samsung | vivo | realme |
| Announced | 2021, January 27 | December 2020 | 2021, March 05 |
| Status | Available. Released 2021, January 27 | Coming Soon - January 2021 | Available. Released 2021, March 05 |
| Price | - | - | Rs. 8,999 ($0.00) [Similarly Priced] |
| Colors | Black, Blue, Red | Dawn White, Nebula Blue | Cross Black, Cross Blue |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
164 x 75.9 x 9.1 mm (6.46 x 2.99 x 0.36 in) |
164.4 x 76.3 x 8.4 mm (6.47 x 3 x 0.33 in) |
165.2 x 76.4 x 8.9 mm (6.5 x 3.01 x 0.35 in) |
| Weight | 206 g (7.27 oz) | 192 g (6.77 oz) | 190 g (6.7 oz) |
| SIM Type | Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) | 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 (dual-SIM model only) | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 2100 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 |
HSDPA 850 / 900 / 2100 | HSDPA 850 / 900 / 2100 |
| 4G Network | LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900) 20(800), 28(700), 32(1500), 38(2600), 40(2300), 41(2500) | 1, 3, 5, 7, 8, 38, 40, 41 | 1, 3, 5, 7, 8, 20, 28, 38, 40, 41 |
| Messaging | |||
| Build Features | - | - Fingerprint Sensor (side-mounted) |
- Fingerprint Sensor (rear-mounted) |
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| OS | Android 10 | Android 10 | Android 10 |
| User Interface | One UI 2.5 | Funtouch 11 | Realme UI 1.0 |
| Processor | Octa-core 1.8 GHz Cortex-A53, Qualcomm SM4250 Snapdragon 450 (11 nm) | Octa-core (4x2.35 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53), Mediatek MT6765 Helio P35 (12nm) | Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53), MediaTek Helio G35 (12 nm) |
| GPU | Adreno 506 | PowerVR GE8320 | PowerVR GE8320 |
| RAM | 2 GB | 4 GB | 4 GB |
| Internal Memory | 32 GB | 64 GB | 64 GB |
| External Memory | microSDXC (dedicated slot) | microSDXC (dedicated slot) | microSDXC (dedicated slot) |
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| Type | PLS TFT Display | HD+ IPS LCD Screen | HD+ IPS LCD Screen |
| Colors | 16M Colour | 16M Colour | 16M Colour |
| Size | 6.5 inches | 6.51 inches | 6.5 inches |
| Resolution | 720 x 1520 pixels (259 ppi) | 720 x 1600 pixels (270 ppi) | 720 x 1600 pixels (270 ppi) |
| Screen-to-Body Ratio | 84.56% | 81.28% | 80.78% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | FM radio | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 13 MP + 2 MP | 13 MP + 2 MP + 2 MP | 13 MP + 2 MP + 2 MP |
| Flash | LED Flash | LED Flash | LED Flash |
| Features | 13 MP, f/2.2, 28mm (wide), 1/3.1", 1.12µm, AF 2 MP, f/2.4, (depth) |
13 MP, f/1.8, (wide), PDAF 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) HDR |
13 MP, f/2.2, 26mm (wide), 1/3.06", 1.12µm, PDAF 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) HDR, panorama |
| Video | 1080p@30fps | 1080p@30fps | 1080p@30fps |
| Front Camera | 8 MP, f/2.2, 1/4", 1.12µm [Similar] |
8 MP, f/1.8 (Wide) 1080p@30fps [Similar] |
5 MP, f/2.2, (wide), 1/5.0", 1.12µm HDR 1080p@30fps [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | HSPA 42.2/5.76 Mbps, LTE-A | HSPA 42.2/5.76 Mbps, LTE |
| Bluetooth | 4.2, A2DP, LE | 5.0, A2DP, LE | 5.1, A2DP, LE |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot | 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 |
| USB | microUSB 2.0 | microUSB 2.0, USB On-The-Go | microUSB 2.0, USB On-The-Go |
| GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS | Yes, with A-GPS, GLONASS, GALILEO, BDS | Yes, with A-GPS, GLONASS, BDS |
| Browser | Yes | Yes | Yes |
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| Internal | 32 GB, 2 GB RAM | 64 GB, 4 GB RAM | 64 GB, 4 GB RAM or 32 GB, 3 GB RAM eMMC 5.1 |
| Expandable Storage | microSDXC (dedicated slot) | microSDXC (dedicated slot) | microSDXC (dedicated slot) |
| USB OTG | Not 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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| NFC | |
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| Type | Non-removable Li-Po Battery Battery Charging 10W |
Non-removable Li-Po Battery Battery Charging 10W |
Non-removable Li-Po Battery Battery Charging 10W |
| Capacity | 5000 mAh | 5000 mAh | 5000 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
Rs. 8,999 
