Phone Comparison - Asus Zenfone 4 Max vs Samsung Galaxy M21s vs Samsung Galaxy A02s
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| Manufacturer | Asus | Samsung | Samsung |
| Announced | July 2017 | November 2020 | 2020, November 24 |
| Status | Coming Soon - July 2017 | Available - November 2020 | Coming Soon - Februrary 2021 |
| Price | Rs. 15,200 ($235.00) [Similarly Priced] | - | - |
| Colors | Black, Gold, Pink | Blue, Black | Black, White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
154 x 76.9 x 8.9 mm (6.06 x 3.03 x 0.35 in) |
159.2 x 75.1 x 8.9 mm (6.27 x 2.96 x 0.35 in) |
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| Weight | 181 g (6.38 oz) | 191 g (6.74 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 | 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) |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 - Global | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | HSDPA 850 / 900 / 2100 |
| 4G Network | LTE band 1(2100), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 20(800) - Global | LTE | LTE (unspecified) |
| Messaging | SMS, MMS, Push Mail, EMail, IM | ||
| Build Features | - Fingerprint Sensor | - Fingerprint Sensor |
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| Notification LED | Yes | - | - |
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| OS | Android OS, v7.0 (Nougat) | Android 10 | Android 10 |
| User Interface | Zen UI 3.0 | One UI 2.5 | - |
| Processor | Octa-core 1.4 GHz Cortex-A53, Qualcomm MSM8937 Snapdragon 430 | Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53), Exynos 9611 (10nm) | Octa-core 1.8 GHz Cortex-A53, Qualcomm SM4250 Snapdragon 450 (11 nm) |
| GPU | Adreno 505 | Mali-G72 MP3 | Adreno 506 |
| RAM | 2/3/4 GB | 4 GB | 3 GB |
| Internal Memory | 16/32/64 GB | 128 GB | 32 GB |
| External Memory | microSD, upto 256GB | microSDXC | microSDXC |
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| Type | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 4 | Super AMOLED Screen, 420 nits (typ), Corning Gorilla Glass 3 | HD+ TFT Display |
| Colors | 16M colors | 16M Colour | 16M Colour |
| Size | 5.5 inches | 6.4 inches | 6.5 inches |
| Resolution | 1080 x 1920 pixels (401 ppi) | 1080 x 2340 pixels (403 ppi) | 720 x 1520 pixels (259 ppi) |
| Screen-to-Body Ratio | 70.25% | 83.97% | - |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | FM radio, RDS, recording | Unspecified |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | Dual 13 MP | 64 MP + 8 MP + 5 MP | 13 MP + 2 MP + 2 MP |
| Flash | LED Flash | LED Flash | LED Flash |
| Features | Autofocus, Geo-tagging, 120 degree wide-angle lens, Dual-cameras, Touch Focus, Face/smile Detection, Panorama, HDR | 64 MP, (wide), PDAF 8 MP, f/2.2, 12mm (ultrawide), 1/4.0", 1.12µm 5 MP, f/2.2, (depth) Panorama, HDR |
13 MP, (wide), AF 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) |
| Video | 1080p@30fps | 4K@30fps, 1080p@30fps, gyro-EIS | 1080p@30fps |
| Front Camera | 8 MP [Similar] |
32 MP, f/2.4, (wide), 1/2.8", 0.8µm HDR 1080p@30fps [Similar] |
5 MP, f/2.2 [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 Cat4 150/50 Mbps |
| Bluetooth | v4.0, A2DP, EDR | 5.0, A2DP, LE | Yes |
| 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 | Yes |
| USB | Yes, USB On-the-Go | USB Type-C 2.0 | microUSB 2.0 |
| GPS | Yes, with A-GPS, GLONASS | Yes, with A-GPS, GLONASS, BDS | Yes, with A-GPS, GLONASS, GALILEO, BDS |
| Browser | HTML5 | Yes | Yes |
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| Internal | 16/32/64 GB, 2/3/4 GB RAM | 128 GB, 4 GB RAM or 64 GB, 4 GB RAM | 32 GB, 3 GB RAM |
| Expandable Storage | microSD, upto 256GB | microSDXC | microSDXC |
| USB OTG | Supported | Not Supported | Not 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 | Li-Ion Battery | Non-removable Li-Po Battery Fast battery charging 15W |
Non-removable Li-Po Battery Fast battery charging 15W |
| Capacity | 5000 mAh | 6000 mAh | 5000 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
