Oppo K13s vs Ulefone Note 21

At a glance

Brand: Oppo; Ulefone
Release date: September 2025, 9 months ago; January 2025, 1 years 5 months ago
AnTuTu: 825.000 Antutu v10 Overall performance better than 81% of devices; 251.000 Antutu v10 Overall performance better than 59% of devices

Size: 6.8"; 6.56"
Resolution: 1280 x 2800 px QHD; 720 x 1612 px HD+
Type: AMOLED; LCD IPS
Density: 453 ppi Very high density; 269 ppi Medium Density
Aspect ratio: 20:9; 20:9
Features: Hole-punch Notch, SGS Certified, TÜV Rheinland Flicker-free Certified, TÜV Low Blue Light, Refresh rate 120 Hz, Touch sampling rate 240 Hz, Brightnes 600 cd/m² (typ), Max brightness HBM - 1600 cd/m², TÜV Rheinland Eye Comfort Certification, HDR10+, DCI-P3, DC dimming, Scratch resistant, 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: Qualcomm Snapdragon 7 Gen 3 (SM7550-AB); Unisoc Tiger T606
CPU: 1x2.63 GHz Cortex A715 +3x2.4 GHz Cortex A715 + 4x1.8 GHz Cortex A510; 2x1.6 GHz Cortex A75 + 6x1.6 GHz Cortex A55
CPU type: Octa-Core; Octa-Core
Process: 4 nm; 12 nm
Frequency: 2.63 GHz; 1.6 GHz
GPU: Qualcomm Adreno 720; ARM Mali-G57
RAM: 12 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
Flash: LED; LED
Optical stabilization: Yes; No
Slow motion: Yes, 960 fps; No, 30 fps
Features: Noise reduction, 4K Video, Digital zoom, Dual camera, Digital image stabilization, Optical Stabilization (OIS), Autofocus, Touch focus, Manual focus, Phase detection autofocus (PDAF), Laser autofocus (LAF), Continuous shooting, Geotagging, Panorama, HDR, Face detection, White balance settings, ISO settings, Exposure compensation, Scene mode, Self-timer, 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
Sensor: —; Samsung S5K3L6
Pixel size: —; 1.12 µm
Sensor size: —; 1/3.1"

Dimensions: 77.6 mm 163.1 mm 7.7 mm Print 3D Model; 75.2 mm 163.2 mm 9.2 mm Print 3D Model
Weight: 195 g; 196 g
Materials: Plastic; Plastic
Colors: White Blue; Black Violet
Water/dust resistance: IP65; —
Usable surface: 89 %; 84 %
Drop resistance: —; Class A B C D E 113 drops without defects
Repairability: —; Class A B C D E

Operating system: Android 15 ColorOS 15 (Android 15); Android 14 Upside-down cake Android 14
Google services: Without 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, AAC; 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); 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, Beidou, QZSS, Galileo, GPS (L1+L5), BeiDou (B1), Galileo (E1+E5a), BeiDou (B2), QZSS (L1 + L5); GPS, A-GPS, GLONASS, Beidou, Galileo

5G: n1 (2100), n3 (1800), n5 (850), n8 (900), n28a (700), n38 (2600), n40 (2300), n41 (2500), n77 (3700), n78 (3500); —
4G LTE: B1 (2100), B3 (1800), B5 (850), B8 (900), B19 (800), B28a (700), B34 (TDD 2100), B38 (TDD 2600), B39 (TDD 1900), B40 (TDD 2300), B41 (TDD 2500), B42 (TDD 3500), B48 (TDD 3600); 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), B19 (800); B1 (2100), B2 (1900), B5 (850), B8 (900)
2G: B3 (1800), B5 (850), B8 (900); B2 (1900), B3 (1800), B5 (850), B8 (900)

Fingerprint: Yes, in screen; Yes, on the side
Accelerometer: Yes; Yes
Gyroscope: Yes; —
Proximity: Yes; Yes
Light sensor: Yes; Yes
Cooling system: Yes; No
Audio: Hi-Res Audio, Noise cancellation microphone, Stereo Speakers, 2 microphones; —