| Karbonn Smart A51 |
Xiaomi Redmi Note 9 Pro |
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| Hardware and OS | Karbonn Smart A51 | Xiaomi Redmi Note 9 Pro |
| Operating system | Android v4.0.4 (Ice Cream Sandwich) | Android 10.0; MIUI 11 |
| Processor | Dual core, 1 GHz | Octa-core (2x2.3 GHz Kryo 465 Gold & 6x1.8 GHz Kryo 465 Silver) |
| Chipset | Qualcomm SM7125 Snapdragon 720G (8 nm) | |
| RAM | 256 MB | |
| GPU | Adreno 618 | |
| Internal memory | 512 MB | 64GB 4GB RAM, 128GB 6GB RAM |
| Expandable Memory | Yes, Up to 32 GB | |
| External memory | microSDXC (dedicated slot) | |
| Display | Karbonn Smart A51 | Xiaomi Redmi Note 9 Pro |
| Screen Size | 3.5 inches (8.89 cm) | |
| Type | IPS LCD | |
| Size | 6.67" inc | |
| Display Type | TFT | |
| Resolution | 320 x 480 pixels | 1080 x 2400 px |
| Protection | Corning Gorilla Glass 5 | |
| Touch Screen | Yes, Capacitive Touchscreen | |
| Touchscreen | capacitive touchscreen | |
| Screen-to-Body Ratio | 84.5% | |
| Display area | 107.4 cm2 | |
| Display aspect ratio | 20:9 (height:width) | |
| Pixel Density | 165 ppi | 395 PPI |
| Colors | 16M | |
| Other | 450 nits typ. brightness (advertised) | |
| Main Camera | Karbonn Smart A51 | Xiaomi Redmi Note 9 Pro |
| Resolution | 3.2 MP Primary Camera | |
| Image Resolution | 2048 x 1536 Pixels | |
| Flash | Yes, LED Flash | |
| Camera Features | Digital Zoom | |
| Camera Setup | Single | |
| Front Camera | Karbonn Smart A51 | Xiaomi Redmi Note 9 Pro |
| Resolution | 0.3 MP Primary Camera | |
| Camera Setup | Single | |
| Connectivity | Karbonn Smart A51 | Xiaomi Redmi Note 9 Pro |
| 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 | Yes, Wi-Fi 802.11, b/g | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot |
| SIM 1 | 2G Bands: GSM 1800 / 900 MHz GPRS: Class 12 EDGE: Class 12 | |
| Network | 2G | GSM / HSPA / LTE |
| SIM 2 | 2G Bands: GSM 1800 / 900 MHz | |
| SIM card | Dual SIM (Nano-SIM, dual stand-by) | |
| Bluetooth | Yes | 5.0, A2DP, LE |
| Edge | Yes | |
| USB Connectivity | microUSB 2.0 | |
| 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 | Karbonn Smart A51 | Xiaomi Redmi Note 9 Pro |
| Main camera | 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 | |
| Features | Karbonn Smart A51 | Xiaomi Redmi Note 9 Pro |
| Other Sensors | Accelerometer | |
| Multimedia | Karbonn Smart A51 | Xiaomi Redmi Note 9 Pro |
| Audio Jack | 3.5 mm | |
| FM Radio | Yes | |
| 3.5 mm Jack | Yes | |
| Radio | FM radio, recording | |
| Design | Karbonn Smart A51 | Xiaomi Redmi Note 9 Pro |
| Height | 132 mm | |
| Width | 67.5 mm | |
| Thickness | 9.25 mm | |
| Colours | Black, White | |
| 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 | Karbonn Smart A51 | Xiaomi Redmi Note 9 Pro |
| Type | Li-ion | |
| Capacity | 1100 mAh | |
| Battery capacity | 5020 mAh, Non-removable Li-Po | |
| Other | Karbonn Smart A51 | Xiaomi Redmi Note 9 Pro |
| Release date | 2020, March 12 | |
| Sensors | Fingerprint (side-mounted), accelerometer, gyro, proximity, compass , Infrared port |
