Oppo A57 4G vs Ulefone Armor 21

At a glance

Brand: Oppo; Ulefone
Release date: May 2022, 4 years 1 months ago; May 2023, 3 years 1 months ago
AnTuTu: 110.000 Antutu v8 Overall performance better than 51% of devices; 411.900 Antutu v10 Overall performance better than 68% of devices

Size: 6.56"; 6.58"
Resolution: 720 x 1612 px HD+; 1080 x 2408 px FHD+
Type: LCD IPS; LCD IPS
Density: 269 ppi Medium Density; 367 ppi High Density
Aspect ratio: 20:9; 20:9
Features: Hole-punch Notch, Brightnes 480 cd/m² (typ), Max brightness HBM - 550 cd/m², 1500:1 contrast ratio, DCI-P3, 70% NTSC, 96% NTSC, Scratch resistant, 2.5D curved glass screen, Capacitive, Multi-touch, Frameless; Water Drop Notch, Refresh rate 120 Hz, Touch sampling rate 240 Hz, Color LED Notifications, Scratch resistant, Capacitive, Multi-touch, Oleophobic coating

Resolution: 13 Mpx; 64 Mpx
Aperture: ƒ/ 2.2; ƒ/ 1.9
Flash: LED; Dual LED
Optical stabilization: No; No
Slow motion: Yes, 120 fps; No, 30 fps
Features: Triple camera, Digital image stabilization, Autofocus, Touch focus, Manual focus, Phase detection autofocus (PDAF), Geotagging, Panorama, HDR, Face detection, White balance settings, ISO settings, Exposure compensation, Scene mode, Self-timer; Digital zoom, Autofocus, Touch focus, Phase detection autofocus (PDAF), Continuous shooting, Geotagging, Panorama, HDR, Face detection, White balance settings, ISO settings, Exposure compensation, Scene mode, Self-timer
Sensor: —; Sony IMX686 Exmor RS
Pixel size: —; 0.80 µm
Sensor size: —; 1/1.7"

Dimensions: 75.0 mm 163.7 mm 8.0 mm Print 3D Model; 81.6 mm 176.0 mm 18.1 mm Print 3D Model
Weight: 187 g; 400 g
Materials: Plastic; Rugged Smartphone, Polycarbonate
Colors: Black Green; Black
Water/dust resistance: IP54; IP68, IP69 , MIL-STD-810H
Usable surface: 82 %; 77 %
Drop resistance: —; Class A B C D E 270 drops without defects
Repairability: —; Class A B C D E

Operating system: Android 12 Snow Cone ColorOS 12.1 (Android 12); Android 13 Tiramisu Android 13
Google services: With Google Mobile Services; With Google Mobile Services

SIM: Dual SIM Dual Standby (Nano SIM + Nano SIM); Dual SIM Dual Standby (Nano SIM + Nano SIM)
Bluetooth: Bluetooth 5.1 LELow energy consumption; Bluetooth 5.2 LELow energy consumption
Bluetooth profiles: A2DP (Advanced Audio Distribution Profile), LE (Low Energy), APT-x, LDAC, SBC, AAC; A2DP (Advanced Audio Distribution Profile), LE (Low Energy)
Wi-Fi: 802.11a , 802.11b , 802.11g , 802.11n , 802.11n 5GHz , 802.11ac; 802.11a , 802.11b , 802.11g , 802.11n , 802.11n 5GHz , 802.11ac
Wi-Fi features: Dual band, Wi-Fi Hotspot, Wi-Fi Direct, Wi-Fi Display; Dual band, Wi-Fi Hotspot, Wi-Fi Direct, Wi-Fi Display
USB: USB Type-C; USB Type-C
USB features: Charging, OTG; Charging, OTG
Navigation: GPS, A-GPS, GLONASS, Beidou, QZSS, Galileo; GPS, A-GPS, GLONASS, Beidou, Galileo

4G LTE: B1 (2100), B3 (1800), B5 (850), B7 (2600), B8 (900), B20 (800), B28b (700), B28a (700), B38 (TDD 2600), B40 (TDD 2300), B41 (TDD 2500); B1 (2100), B2 (1900), B3 (1800), B4 (1700/2100 AWS 1), B5 (850), B7 (2600), B8 (900), B12 (700), B17 (700), B18 (800), B19 (800), B20 (800), B28b (700), B28a (700), B34 (TDD 2100), B38 (TDD 2600), B39 (TDD 1900), B40 (TDD 2300), B41 (TDD 2500), B66 (1700/2100)
3G: B1 (2100), B5 (850), B8 (900); B1 (2100), B2 (1900), B4 (1700/2100 AWS A-F), B5 (850), B8 (900)
2G: B2 (1900), B3 (1800), B5 (850), B8 (900); CDMA BC0 (800), CDMA BC1 (1900), B2 (1900), B3 (1800), B5 (850), B8 (900)