| BenQ-Siemens P51 |
Xiaomi Redmi Note 9 Pro |
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| Hardware and OS | BenQ-Siemens P51 | Xiaomi Redmi Note 9 Pro |
| Operating system | Microsoft Windows Mobile 5.0 PocketPC | Android 10.0; MIUI 11 |
| Processor | 32-bit Intel XScale PXA272 416 MHz | Octa-core (2x2.3 GHz Kryo 465 Gold & 6x1.8 GHz Kryo 465 Silver) |
| Chipset | Qualcomm SM7125 Snapdragon 720G (8 nm) | |
| GPU | Adreno 618 | |
| Internal memory | 64MB RAM, 192MB ROM | 64GB 4GB RAM, 128GB 6GB RAM |
| External memory | MMC/SDIO | microSDXC (dedicated slot) |
| Display | BenQ-Siemens P51 | Xiaomi Redmi Note 9 Pro |
| Type | TFT resistive touchscreen, 256K colors | IPS LCD |
| Size | 2.8 inches, 42 x 57 mm, 24.3 cm2 | 6.67" inc |
| Resolution | 240 x 320 pixels, 4:3 ratio | 1080 x 2400 px |
| Protection | Corning Gorilla Glass 5 | |
| Touchscreen | capacitive touchscreen | |
| Screen-to-Body Ratio | 84.5% | |
| Display area | 107.4 cm2 | |
| Display aspect ratio | 20:9 (height:width) | |
| Pixel Density | 395 PPI | |
| Colors | 16M | |
| Other | 450 nits typ. brightness (advertised) | |
| Main Camera | BenQ-Siemens P51 | Xiaomi Redmi Note 9 Pro |
| Camera | 1.3 MP | |
| Video | QCIF | |
| Selfie camera | BenQ-Siemens P51 | Xiaomi Redmi Note 9 Pro |
| Camera | No | |
| Connectivity | BenQ-Siemens P51 | Xiaomi Redmi Note 9 Pro |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| Technology | GSM | |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | |
| 4G Network | LTE band 1(2100), 3(1800), 5(850), 8(900), 40(2300), 41(2500) | |
| WLAN | Wi-Fi 802.11b/g, VoIP via Wi-Fi | |
| 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 | 1.2, A2DP | 5.0, A2DP, LE |
| Edge | No | Yes |
| GPRS | Class 10 | Yes |
| GPS | Yes | Yes, with A-GPS, GLONASS, GALILEO, BDS, NavIC |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A | |
| USB | Proprietary | 2.0, Type-C 1.0 reversible connector |
| Camera | BenQ-Siemens P51 | 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 | |
| Multimedia | BenQ-Siemens P51 | Xiaomi Redmi Note 9 Pro |
| Alert types | Vibration; Downloadable polyphonic, MP3 ringtones | |
| Loudspeaker | Yes | |
| 3.5 mm Jack | No | Yes |
| Radio | No | FM radio, recording |
| Design | BenQ-Siemens P51 | Xiaomi Redmi Note 9 Pro |
| SIM | Mini-SIM | |
| Keyboard | QWERTY | |
| Colors | Aurora Blue, Glacier White, Interstellar Black | |
| Body build | Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), plastic frame | |
| Dimensions | 122 x 60 x 20 mm, 130 cc (4.80 x 2.36 x 0.79 in) | 165.8 x 76.7 x 8.8 mm |
| Weight | 170 g (6.00 oz) | 209 g |
| Battery | BenQ-Siemens P51 | Xiaomi Redmi Note 9 Pro |
| Capacity | Removable Li-Ion 1370 mAh battery | |
| Stand-by | Up to 150 h | |
| Talk time | Up to 4 h | |
| Battery capacity | 5020 mAh, Non-removable Li-Po | |
| Other | BenQ-Siemens P51 | Xiaomi Redmi Note 9 Pro |
| Release date | 2020, March 12 | |
| Sensors | Fingerprint (side-mounted), accelerometer, gyro, proximity, compass , Infrared port |
