| Asus Zenfone 4 Pro ZS551KL |
Xiaomi Redmi Note 8 |
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| Hardware and OS | Asus Zenfone 4 Pro ZS551KL | Xiaomi Redmi Note 8 |
| Operating system | Android 7.1.1 (Nougat), upgradable to Android 8 (Oreo); ZenUI 4 | Android 9.0 (Pie); MIUI 10 |
| Processor | Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo) | Octa-core (4x2.0 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) |
| Chipset | Qualcomm MSM8998 Snapdragon 835 (10 nm) | Qualcomm SDM665 Snapdragon 665 (11 nm) |
| GPU | Adreno 540 | Adreno 610 |
| Internal memory | 64/128 GB, 6 GB RAM | 32GB 3GB RAM, 64GB 4GB RAM, 64GB 6GB RAM, 128GB 4GB RAM, 128GB 6GB RAM |
| External memory | microSD, up to 512 GB (uses SIM 2 slot) | microSD, up to 256 GB (dedicated slot) |
| Display | Asus Zenfone 4 Pro ZS551KL | Xiaomi Redmi Note 8 |
| Type | AMOLED | IPS LCD |
| Size | 5.5" inc | 6.3" inc |
| Resolution | 1080 x 1920 px | 1080 x 2340 px |
| Protection | Corning Gorilla Glass 5 | Corning Gorilla Glass 5 |
| Touchscreen | capacitive touchscreen | capacitive touchscreen |
| Screen-to-Body Ratio | 70.3% | 81.7% |
| Display area | 83.4 cm2 | 97.4 cm2 |
| Display aspect ratio | 16:9 (height:width) | 19.5:9 (height:width) |
| Pixel Density | 401 PPI | 409 PPI |
| Colors | 16M | 16M |
| Connectivity | Asus Zenfone 4 Pro ZS551KL | Xiaomi Redmi Note 8 |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 800 / 850 / 900 / 1700(AWS) / 1800 / 1900 / 2100 | HSDPA 850 / 900 / 2100 |
| 4G Network | LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 17(700), 19(800), 20(800), 28(700), 38(2600), 39(1900), 40(2300), 41(2500) - Global, Taiwan | LTE band 1(2100), 3(1800), 5(850), 8(900), 38(2600), 40(2300), 41(2500) |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot |
| Network | GSM / HSPA / LTE | GSM / HSPA / LTE |
| SIM card | Hybrid Dual SIM (Nano-SIM, dual stand-by) | Dual SIM (Nano-SIM, dual stand-by) |
| Bluetooth | 5.0, A2DP, EDR, LE, aptX | 4.2, A2DP, LE |
| Edge | Yes | Yes |
| GPRS | Yes | Yes |
| GPS | Yes, with A-GPS, GLONASS, BDS, GALILEO | Yes, with A-GPS, GLONASS, BDS |
| NFC | Yes | |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A (3CA) Cat12 600/150 or 100 Mbps | HSPA 42.2/11.5 Mbps, LTE-A |
| USB | Type-C 1.0 reversible connector | 2.0, Type-C 1.0 reversible connector, USB On-The-Go |
| Camera | Asus Zenfone 4 Pro ZS551KL | Xiaomi Redmi Note 8 |
| Main camera | 12 MP, Dual | 48 MP, Quad |
| Specs | 12 MP, f/1.7, 25mm (wide), 1/2.55', 1.4µm, 4-axis OIS, dual pixel PDAF & laser AF -16 MP, 50mm (telephoto), 1/3.1', 1.0µm, 2x optical zoom, AF | 48 MP, f/1.8, 26mm (wide), 1/2", 0.8µm, PDAF -8 MP, f/2.2, 13mm (ultrawide), 1/4", 1.12µm -2 MP, f/2.4, 1/5", 1.75µm (dedicated macro camera) -2 MP, f/2.4, 1/5", 1.75µm, depth sensor |
| Features | LED flash, HDR, panorama | LED flash, HDR, panorama |
| Video | 2160p@30fps, 1080p@30/60fps, 1080p@120fps, 720p@240fps | 2160p@30fps, 1080p@30/60/120fps, gyro-EIS |
| Selfie camera | 8 MP, Single | 13 MP, Single |
| Multimedia | Asus Zenfone 4 Pro ZS551KL | Xiaomi Redmi Note 8 |
| 3.5 mm Jack | Yes | Yes |
| Radio | FM radio | FM radio |
| Design | Asus Zenfone 4 Pro ZS551KL | Xiaomi Redmi Note 8 |
| Colors | Moonlight white, Pure Black | Neptune Blue, Moonlight White, Space Black |
| Body build | Front/back glass (Gorilla Glass 5) & aluminum frame | Front/back glass (Gorilla Glass 5) |
| Dimensions | 156.9 x 75.6 x 7.6 mm | 158.3 x 75.3 x 8.4 mm |
| Weight | 175 g | 190 g |
| Battery | Asus Zenfone 4 Pro ZS551KL | Xiaomi Redmi Note 8 |
| Battery capacity | 3600 mAh, Non-removable Li-Ion | 4000 mAh, Non-removable Li-Po |
| Battery life | Talking time- Up to 27 h 30 min (3G) | |
| Other | Asus Zenfone 4 Pro ZS551KL | Xiaomi Redmi Note 8 |
| SAR | SAR - 0.26 W/kg (head) 1.00 W/kg (body) SAR EU - 0.26 W/kg (head) 1.00 W/kg (body) | |
| Release date | 2017, August | 2019, August |
| Sensors | Fingerprint (front-mounted), accelerometer, gyro, proximity, compass, color spectrum , Infrared port | Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass , Infrared port |
