Phone Comparison - Xiaomi Redmi Note 9 vs Oppo Reno4 Z 5G vs Realme 8 5G
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| Manufacturer | Xiaomi | Oppo | Realme |
| Announced | 2020, April 30 | 2020, September 29 | 2021, April 22 |
| Status | Coming soon. Exp. release 2020, May | Coming soon. Exp. release 2020, October | Coming soon. Exp. release 2021, May |
| Colors | Forest Green, Midnight Grey, Polar White | Black, White, Pink | Supersonic Blue, Supersonic Black |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
162.3 x 77.2 x 8.9 mm (6.39 x 3.04 x 0.35 in) |
163.8 x 75.5 x 8.1 mm (6.45 x 2.97 x 0.32 in) |
162.5 x 74.8 x 8.5 mm (6.4 x 2.94 x 0.33 in) |
| Weight | 199 g (7.02 oz) | 184 g (6.49 oz) | 185 g (6.53 oz) |
| SIM Type | 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 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | HSDPA 800 / 850 / 900 / 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), 20(800), 25(1900), 2628, 32(1500), 38(2600), 39(1900), 40(2300), 41(2500) | 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 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 38, 39, 40, 41, 66 |
| 5G Network | - | 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 77, 78 SA/NSA | 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 77, 78 SA/NSA |
| Messaging | |||
| Build Features | - Fingerprint Sensor |
- Fingerprint Sensor (side-mounted) |
- Fingerprint Sensor (side-mounted) |
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| OS | Android 10.0 | Android 10 | Android 11 |
| User Interface | MIUI 11 | ColorOS 7.1 | Realme UI 2.0 |
| Processor | Octa-core (2x Cortex-A75 @ 2 GHz, 6x Cortex-A55 @ 2 GHz), MediaTek Helio G85 (12nm) | Octa-core (4x2.0 GHz Cortex-A76 & 4x2.0 GHz Cortex-A55), MediaTek MT6873V Dimensity 800 5G (7 nm) | Octa-core (4x2.2 GHz Cortex-A76 & 4x2.0 GHz Cortex-A55), MediaTek MT6833 Dimensity 700 5G (7 nm) |
| GPU | Mali-G52 MC2 | Mali-G57MP4 | Mali-G57 MC2 |
| RAM | 4 GB | 8 GB | 8 GB |
| Internal Memory | 128 GB | 128 GB | 128 GB |
| External Memory | microSDXC (dedicated slot) | No | microSDXC (dedicated slot) |
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| Type | FHD+ IPS LCD Capacitive Touchscreen | LTPS IPS LCD Capacitive Touchscreen 120Hz refresh rate 480 nits typ. value (advertised) |
FHD+ IPS LCD Screen 90Hz Refresh Rate 480 nits (typ), 600 nits |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 6.53 inches | 6.57 inches | 6.5 inches |
| Resolution | 1080 x 2340 pixels (395 ppi) | 1080 x 2400 pixels (401 ppi) | 1080 x 2400 pixels (405 ppi) |
| Screen-to-Body Ratio | 83.40% | 84.09% | 83.88% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio, recording | Unspecified | Unspecified |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 48 MP + 8 MP + 2 MP + 2 MP | 48 MP + 8 MP + 2 MP + 2 MP | 48 MP + 2 MP + 2 MP |
| Flash | LED flash | LED Flash | LED Flash |
| Features | 48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 13mm (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (macro), AF 2 MP, f/2.4, (depth) HDR, Panorama |
48 MP, f/1.7, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 119˚ (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) HDR, panorama |
48 MP, f/1.8, 26mm (wide), PDAF 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) HDR, Panorama |
| Video | 1080p@30fps | 4K@30fps, 1080p@30fps, gyro-EIS | 1080p@30fps |
| Front Camera |
13 MP, f/2.3, 29mm (normal), 1/3.1", 1.12µm HDR, Panorama 1080p@30fps [Similar] |
16 MP, f/2.0, 26mm (wide), 1/3.06", 1.0µm 2 MP, f/2.4, (depth) HDR 1080p@30 [Similar] |
16 MP, f/2.1, 26mm (wide) HDR 1080p@30fps [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSPA 42.2/5.76 Mbps, LTE-A | HSPA 42.2/11.5 Mbps, LTE-A, 5G | HSPA 42.2/5.76 Mbps, LTE-A, 5G |
| Bluetooth | 5.0, A2DP, LE | 5.1, A2DP, LE, aptX HD | 5.1, 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 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot |
| USB | 2.0, Type-C 1.0 reversible connector | USB Type-C 2.0, USB On-The-Go | USB Type-C 2.0, USB On-The-Go |
| GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS | Yes, with A-GPS, GLONASS, BDS | Yes, with A-GPS, GLONASS, BDS, GALILEO, QZSS |
| Browser | Yes | Yes | Yes |
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| Internal | 128 GB, 4 GB RAM or 64 GB, 3 GB RAM | 128 GB, 8 GB RAM (UFS 2.1) | 128 GB, 8 GB RAM or 128 GB, 4 GB RAM UFS 2.1 |
| Expandable Storage | microSDXC (dedicated slot) | No | 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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| NFC | |
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| Type | Non-removable Li-Po Battery Fast battery charging 18W |
Non-removable Li-Po Battery Fast battery charging 18W |
Non-removable Li-Po Battery Fast battery charging 18W |
| Capacity | 5020mAh | 4000 mAh | 5000 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
