| Ergo A551 Sky |
Xiaomi Redmi Note 9 Pro |
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| Hardware and OS | Ergo A551 Sky | Xiaomi Redmi Note 9 Pro |
| Operating system | Android 6.0 | Android 10.0; MIUI 11 |
| Processor | MediaTek MT6737, 1300 MHz | Octa-core (2x2.3 GHz Kryo 465 Gold & 6x1.8 GHz Kryo 465 Silver) |
| Chipset | Qualcomm SM7125 Snapdragon 720G (8 nm) | |
| Processor cores number | 4 | |
| GPU | Mali-T720 MP2 | Adreno 618 |
| RAM | 1 GB | |
| Internal memory | 64GB 4GB RAM, 128GB 6GB RAM | |
| Internal Storage | 8 GB | |
| External memory | microSDXC (dedicated slot) | |
| Memory Card Slot | yes | |
| Display | Ergo A551 Sky | Xiaomi Redmi Note 9 Pro |
| Type | colored IPS, sensor | IPS LCD |
| Size | 5.5" | 6.67" inc |
| Resolution | 1280x720 | 1080 x 2400 px |
| Protection | Corning Gorilla Glass 5 | |
| Touchscreen | multitouch, capacitive | capacitive touchscreen |
| Screen-to-Body Ratio | 84.5% | |
| Display area | 107.4 cm2 | |
| Aspect Ratio | 16:9 | |
| Display aspect ratio | 20:9 (height:width) | |
| Pixel Density | 267 | 395 PPI |
| Colors | 16M | |
| Other | 450 nits typ. brightness (advertised) | |
| Connectivity | Ergo A551 Sky | Xiaomi Redmi Note 9 Pro |
| Standard | GSM 900/1800/1900, 3G, 4G LTE, LTE-A Cat. 4 | |
| Interfaces | Wi-Fi 802.11n, Bluetooth 4.0, USB | |
| Multi SIM mode | alternate | |
| SIM-card amount | 2 | |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | |
| 4G Network | LTE band 1(2100), 3(1800), 5(850), 8(900), 40(2300), 41(2500) | |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | |
| Network | GSM / HSPA / LTE | |
| SIM card | Dual SIM (Nano-SIM, dual stand-by) | |
| Bluetooth | 5.0, A2DP, LE | |
| Edge | Yes | |
| GPRS | Yes | |
| GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS, NavIC | |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A | |
| USB | 2.0, Type-C 1.0 reversible connector | |
| Camera | Ergo A551 Sky | Xiaomi Redmi Note 9 Pro |
| Front camera | 5 megapixels | |
| Flash | rear, LED | |
| Video Recording | yes | |
| Main camera | 13 MP | 48 MP, Quad |
| Specs | 48 MP, f/1.8, (wide), 1/2.25", 0.8µm, PDAF -8 MP, f/2.2, 13mm (ultrawide), 1/4.0", 1.12µm -5 MP, f/2.4, (macro), 1.12µm -2 MP, f/2.4, (depth) | |
| Features | LED flash, HDR, panorama | |
| Video | 2160p@30fps, 1080p@30/60/120fps, 720p@960fps, gyro-EIS | |
| Selfie camera | 16 MP, Single | |
| Multimedia | Ergo A551 Sky | Xiaomi Redmi Note 9 Pro |
| Audio | MP3 | |
| Headphone jack | 3.5 mm | |
| 3.5 mm Jack | Yes | |
| Radio | FM radio, recording | |
| Design | Ergo A551 Sky | Xiaomi Redmi Note 9 Pro |
| Case material | plastic | |
| Case type | classic | |
| Colors | Aurora Blue, Glacier White, Interstellar Black | |
| Body build | Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), plastic frame | |
| Dimensions | 165.8 x 76.7 x 8.8 mm | |
| Weight | 209 g | |
| Battery | Ergo A551 Sky | Xiaomi Redmi Note 9 Pro |
| Capacity | 3000 mA?h | |
| Connector type for charging | micro-USB | |
| Battery capacity | 5020 mAh, Non-removable Li-Po | |
| Other | Ergo A551 Sky | Xiaomi Redmi Note 9 Pro |
| Flashlight | yes | |
| Release date | 2020, March 12 | |
| Sensors | Fingerprint (side-mounted), accelerometer, gyro, proximity, compass , Infrared port |
