| Ulefone Armor 21 |
Xiaomi Redmi Note 9 Pro |
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| Hardware and OS | Ulefone Armor 21 | Xiaomi Redmi Note 9 Pro |
| Operating system | Android 13 | Android 10.0; MIUI 11 |
| Processor | Mediatek MT8781 Helio G99 | Octa-core (2x2.3 GHz Kryo 465 Gold & 6x1.8 GHz Kryo 465 Silver) |
| Chipset | Qualcomm SM7125 Snapdragon 720G (8 nm) | |
| GPU | Mali-G57 MC2 | Adreno 618 |
| RAM | 8 GB | |
| Internal memory | 64GB 4GB RAM, 128GB 6GB RAM | |
| Internal Storage | 256 GB | |
| External memory | microSDXC (dedicated slot) | |
| Memory Card Slot | microSDXC (dedicated slot) | |
| User Interface | Yes | |
| Display | Ulefone Armor 21 | Xiaomi Redmi Note 9 Pro |
| Type | IPS LCD | IPS LCD |
| Size | 6.58 inches | 6.67" inc |
| Resolution | 1080 x 2408 pixels | 1080 x 2400 px |
| Protection | Corning Gorilla Glass 5 | |
| Touchscreen | Yes | capacitive touchscreen |
| Screen-to-Body Ratio | 84.5% | |
| Display area | 107.4 cm2 | |
| Display aspect ratio | 20:9 (height:width) | |
| Features | 120Hz | |
| Pixel Density | 401 ppi | 395 PPI |
| Colors | 16M Colors | 16M |
| Other | 450 nits typ. brightness (advertised) | |
| Connectivity | Ulefone Armor 21 | Xiaomi Redmi Note 9 Pro |
| 5G Network | No | |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | |
| NFC | Yes | |
| 4G Network | 1, 2, 3, 4, 5, 7, 8, 12, 17, 19, 20, 28, 34, 38, 39, 40, 41, 66 | 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 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot |
| Network | GSM / HSPA / LTE | |
| SIM | Nano SIM | |
| SIM card | Dual SIM (Nano-SIM, dual stand-by) | |
| Dual SIM | Yes | |
| Wireless Charging | No | |
| Bluetooth | 5.0, A2DP, LE | |
| Edge | Yes | |
| GPRS | Yes | |
| GPS | GPS, GLONASS, GALILEO, BDS | Yes, with A-GPS, GLONASS, GALILEO, BDS, NavIC |
| Speed | HSPA, LTE | HSPA 42.2/5.76 Mbps, LTE-A |
| USB | Type-C 2.0 | 2.0, Type-C 1.0 reversible connector |
| Camera | Ulefone Armor 21 | Xiaomi Redmi Note 9 Pro |
| Image | 2160p | |
| Main camera | 64 MP (wide), 24 MP (night vision) | 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 | Yes | LED flash, HDR, panorama |
| Video | 2160p@30fps, 1080p@30/60/120fps, 720p@960fps, gyro-EIS | |
| Selfie camera | 16 MP (wide) | 16 MP, Single |
| Multimedia | Ulefone Armor 21 | Xiaomi Redmi Note 9 Pro |
| Loudspeaker | Yes | |
| Handsfree | Yes | |
| Video Playback | Yes | |
| Video Out | Yes | |
| Ring Tones | Yes | |
| 3.5 mm Jack | Yes | Yes |
| Radio | Yes | FM radio, recording |
| Design | Ulefone Armor 21 | Xiaomi Redmi Note 9 Pro |
| Waterproof | IP68/IP69K dust/water resistant (up to 1.5m for 30 min) | |
| Colors | Aurora Blue, Glacier White, Interstellar Black | |
| Body build | Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), plastic frame | |
| Dimensions | 176 x 81.6 x 18.1 mm | 165.8 x 76.7 x 8.8 mm |
| Weight | 400 grams | 209 g |
| Battery | Ulefone Armor 21 | Xiaomi Redmi Note 9 Pro |
| Capacity | Li-Po 9600 mAh, 33W wired | |
| Placement | Non-removable | |
| Battery capacity | 5020 mAh, Non-removable Li-Po | |
| Other | Ulefone Armor 21 | Xiaomi Redmi Note 9 Pro |
| Release date | 2020, March 12 | |
| Sensors | Side-mounted fingerprint, accelerometer, proximity, compass, gyro, barometer, | Fingerprint (side-mounted), accelerometer, gyro, proximity, compass , Infrared port |
