realme P4x vs Ulefone Note 21

At a glance

Brand: realme; Ulefone
Release date: December 2025, 6 months ago; January 2025, 1 years 5 months ago
Launch price: ₹ 15,499.00 ($ 164.43); —
AnTuTu: 739.000 Antutu v10 Overall performance better than 79% of devices; 251.000 Antutu v10 Overall performance better than 59% of devices

Size: 6.72"; 6.56"
Resolution: 1080 x 2400 px FHD+; 720 x 1612 px HD+
Type: LCD IPS; LCD IPS
Density: 392 ppi High Density; 269 ppi Medium Density
Aspect ratio: 20:9; 20:9
Features: Hole-punch Notch, Refresh rate 144 Hz, Brightnes 800 cd/m² (typ), Peak brightness - 1000 cd/m², DCI-P3, 10 Bits panel, Scratch resistant, 3D curved glass screen, Capacitive, Multi-touch, Frameless; Water Drop Notch, Refresh rate 90 Hz, Brightnes 450 cd/m² (typ), 2.5D curved glass screen, Capacitive, Multi-touch, Frameless

Chipset: MediaTek Dimensity 7400; Unisoc Tiger T606
CPU: 4x2.6 GHz Cortex A78 + 4x 2.0 GHz Cortex A55; 2x1.6 GHz Cortex A75 + 6x1.6 GHz Cortex A55
CPU type: Octa-Core; Octa-Core
Process: 4 nm; 12 nm
Frequency: 2.6 GHz; 1.6 GHz
GPU: Mali-G615 MP2; ARM Mali-G57
RAM: 6 GB; 4 GB
RAM type: LPDDR4X RAM; LPDDR4X RAM
64-bit: Yes; Yes

Resolution: 50 Mpx; 13 Mpx
Aperture: ƒ/ 1.8; ƒ/ 2.2
Sensor: Sony IMX882; Samsung S5K3L6
Pixel size: 0.80 µm; 1.12 µm
Sensor size: 1/1.95"; 1/3.1"
Flash: LED; LED
Optical stabilization: Yes; No
Slow motion: Yes, 480 fps; No, 30 fps
Features: Time-Lapse, 4K Video, Digital zoom, Triple camera, Digital image stabilization, Optical Stabilization (OIS), Autofocus, Touch focus, Continuous autofocus, Manual focus, Phase detection autofocus (PDAF), Dual PDAF, Continuous shooting, Geotagging, Panorama, HDR, Face detection, White balance settings, ISO settings, Exposure compensation, Scene mode, Self-timer, Dual capture, Night Mode; Digital zoom, Dual camera, Digital image stabilization, Autofocus, Touch focus, Continuous shooting, Geotagging, HDR, Face detection, White balance settings, ISO settings, Exposure compensation, Scene mode, Self-timer

Capacity: 128 GB; 128 GB
Type: UFS Storage 3.1; —
SD slot: Yes , Slot for SD or second SIM card; Yes , Slot for SD or second SIM card

Dimensions: 75.9 mm 165.8 mm 8.4 mm Print 3D Model; 75.2 mm 163.2 mm 9.2 mm Print 3D Model
Weight: 284 g; 196 g
Materials: Leather; Plastic
Colors: Silver Green Violet; Black Violet
Water/dust resistance: IP64; —
Usable surface: 86 %; 84 %
Drop resistance: —; Class A B C D E 113 drops without defects
Repairability: —; Class A B C D E

Operating system: Android 15 RealmeUI 6.0 (Android 15); Android 14 Upside-down cake 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 5.4 LELow energy consumption; Bluetooth 5.0 LELow energy consumption
Bluetooth profiles: A2DP (Advanced Audio Distribution Profile), LE (Low Energy), APT-x, LDAC, SBC; A2DP (Advanced Audio Distribution Profile), HID (Human Interface Profile), LE (Low Energy)
Wi-Fi: 802.11a , 802.11b , 802.11g , 802.11n , 802.11n 5GHz , 802.11ac, WiFi 6 (802.11ax) , WiFi 6E; 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, Wi-Fi MiMO; 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, QZSS, Galileo, GPS (L1+L5), Galileo (E1+E5a); GPS, A-GPS, GLONASS, Beidou, Galileo

5G: n1 (2100), n3 (1800), n5 (850), n8 (900), n28b (700), n40 (2300), n41 (2500), n77 (3700), n78 (3500); —
4G LTE: B1 (2100), B3 (1800), B5 (850), B8 (900), B28b (700), 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), B19 (800), B20 (800), B26 (850), B28b (700), B28a (700), B38 (TDD 2600), B40 (TDD 2300), B41 (TDD 2500), B66 (1700/2100)
3G: B1 (2100), B5 (850), B8 (900); B1 (2100), B2 (1900), B5 (850), B8 (900)
2G: B3 (1800), B5 (850), B8 (900); B2 (1900), B3 (1800), B5 (850), B8 (900)