Ulefone Armor 21 vs Xiaomi Redmi A4

At a glance

Brand: Ulefone; Xiaomi
Release date: May 2023, 3 years 1 months ago; November 2024, 1 years 7 months ago
AnTuTu: 411.900 Antutu v10 Overall performance better than 68% of devices; 383.772 Antutu v10 Overall performance better than 65% of devices
Launch price: —; ₹ 9,499.00 ($ 100.78)

Size: 6.58"; 6.88"
Resolution: 1080 x 2408 px FHD+; 720 x 1640 px HD+
Type: LCD IPS; LCD IPS
Density: 367 ppi High Density; 260 ppi Medium Density
Aspect ratio: 20:9; 21:9
Features: Water Drop Notch, Refresh rate 120 Hz, Touch sampling rate 240 Hz, Color LED Notifications, Scratch resistant, Capacitive, Multi-touch, Oleophobic coating; Water Drop Notch, TÜV Rheinland Flicker-free Certified, TÜV Low Blue Light, Refresh rate 120 Hz, Touch sampling rate 240 Hz, Brightnes 450 cd/m² (typ), Max brightness HBM - 600 cd/m², TÜV Rheinland Eye Comfort Certification, DCI-P3, Scratch resistant, 2.5D curved glass screen, Capacitive, Frameless

Chipset: MediaTek Helio G99 (MT6789); Qualcomm Snapdragon 4s Gen 2
CPU: 2x Cortex A76 2.2 GHz + 6x Cortex A55 2.0 GHz; 2x2.2 GHz Cortex A78 +6x2.0 GHz Cortex A55
CPU type: Octa-Core; Octa-Core
Process: 6 nm; 4 nm
Frequency: 2.2 GHz; 2.2 GHz
GPU: Mali-G57 MC2; Qualcomm Adreno 613
RAM: 8 GB; 4 GB
RAM type: LPDDR4X RAM; LPDDR4X RAM
64-bit: Yes; Yes

Resolution: 64 Mpx; 50 Mpx
Aperture: ƒ/ 1.9; ƒ/ 1.8
Sensor: Sony IMX686 Exmor RS; —
Pixel size: 0.80 µm; —
Sensor size: 1/1.7"; —
Flash: Dual LED; LED
Optical stabilization: No; No
Slow motion: No, 30 fps; Yes, 120 fps
Features: 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; Digital zoom, Dual camera, Digital image stabilization, Autofocus, Touch focus, Phase detection autofocus (PDAF), Geotagging, HDR, Face detection, White balance settings, ISO settings, Exposure compensation, Scene mode, Self-timer

Dimensions: 81.6 mm 176.0 mm 18.1 mm Print 3D Model; 77.8 mm 171.9 mm 8.2 mm Print 3D Model
Weight: 400 g; 213 g
Materials: Rugged Smartphone, Polycarbonate; Polycarbonate , Glass
Colors: Black; Black Purple
Water/dust resistance: IP68, IP69 , MIL-STD-810H; IP52
Drop resistance: Class A B C D E 270 drops without defects; —
Repairability: Class A B C D E; —
Usable surface: 77 %; 84 %

Operating system: Android 13 Tiramisu Android 13; Android 14 Upside-down cake HyperOS (Android 14)
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 5.2 LELow energy consumption; Bluetooth 5.0 LELow energy consumption
Bluetooth profiles: A2DP (Advanced Audio Distribution Profile), LE (Low Energy); A2DP (Advanced Audio Distribution Profile), EDR (Enhanced Data Rate), HID (Human Interface Profile), LE (Low Energy), AAC
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, Galileo; GPS, A-GPS, GLONASS, Beidou, Galileo

4G LTE: 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); B1 (2100), B3 (1800), B5 (850), B7 (2600), B8 (900), B28b (700), B28a (700), B38 (TDD 2600), B40 (TDD 2300), B41 (TDD 2500)
3G: B1 (2100), B2 (1900), B4 (1700/2100 AWS A-F), B5 (850), B8 (900); B1 (2100), B2 (1900), B5 (850), B8 (900)
2G: CDMA BC0 (800), CDMA BC1 (1900), B2 (1900), B3 (1800), B5 (850), B8 (900); B2 (1900), B3 (1800), B5 (850), B8 (900)
5G: —; n1 (2100), n3 (1800), n5 (850), n8 (900), n28b (700), n28a (700), n40 (2300), n78 (3500)