Oukitel C66 vs Vivo Y31d

At a glance

Brand: Oukitel; vivo
Release date: January 2026, 4 months ago; January 2026, 4 months ago
AnTuTu: 308.681 Antutu v10 Overall performance better than 61% of devices; 410.556 Antutu v10 Overall performance better than 68% of devices

Size: 6.73"; 6.75"
Resolution: 720 x 1560 px HD+; 720 x 1570 px HD+
Type: LCD IPS; AMOLED
Density: 255 ppi Medium Density; 256 ppi Medium Density
Aspect ratio: 21:9; 20:9
Features: Hole-punch Notch, Refresh rate 120 Hz, Brightnes 500 cd/m² (typ), Brightnes 450 cd/m² (typ), 1500:1 contrast ratio, 2.5D curved glass screen, Corning Gorilla Glass 5, Capacitive, Multi-touch, Frameless, In-cell; Water Drop Notch, 107% NTSC, Refresh rate 120 Hz, Peak brightness - 1800 cd/m², TÜV Rheinland Eye Comfort Certification, DCI-P3, 2.5D curved glass screen, Capacitive, Multi-touch, Frameless

Chipset: Unisoc Tiger T615 (T7250); Qualcomm Snapdragon 6s Gen2
CPU: 2 x ARM Cortex A75 1.8Ghz + 6 x ARM Cortex A55 1.6Ghz; 4x2.9 GHz ARM Cortex A73 +4x 1.9 GHz ARM Cortex A53
CPU type: Octa-Core; Octa-Core
Process: 12 nm; 6 nm
Frequency: 1.8 GHz; 2.9 GHz
GPU: Mali-G57 MP1; Adreno 610
RAM: 4 GB; 6 GB
64-bit: Yes; Yes
RAM type: —; LPDDR4X RAM

Resolution: 64 Mpx; 50 Mpx
Aperture: ƒ/ 1.8; ƒ/ 2.0
Flash: LED; LED
Optical stabilization: No; No
Slow motion: No, 30 fps; Yes, 120 fps
Features: Digital zoom, Triple camera, Autofocus, Touch focus, Geotagging, Panorama, HDR, Face detection, White balance settings, ISO settings, Exposure compensation, Scene mode, Self-timer; Digital zoom, Dual camera, 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, Front Flash

Dimensions: 78.0 mm 165.0 mm 8.7 mm Print 3D Model; 78.4 mm 166.6 mm 8.5 mm Print 3D Model
Weight: 198 g; 219 g
Materials: Plastic; Plastic
Colors: Black Gold Gray Purple Orange; Black Gray
Usable surface: 87 %; 85 %
Water/dust resistance: —; IP68, IP69

SIM: Dual SIM Dual Standby (Nano SIM + Nano SIM); Dual SIM Dual Standby (Nano SIM + Nano SIM)
Bluetooth: Bluetooth 5.2; Bluetooth 5.1 LELow energy consumption
Bluetooth profiles: A2DP (Advanced Audio Distribution Profile); A2DP (Advanced Audio Distribution Profile), EDR (Enhanced Data Rate), LE (Low Energy)
Wi-Fi: 802.11a , 802.11b , 802.11g , 802.11n , 802.11ac; 802.11a , 802.11b , 802.11g , 802.11n , 802.11n 5GHz , 802.11ac
Wi-Fi features: Wi-Fi Hotspot; 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, QZSS, 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), B26 (850), 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), B20 (800), B28b (700), B28a (700), B38 (TDD 2600), B40 (TDD 2300), B41 (TDD 2500)
3G: B1 (2100), B2 (1900), B4 (1700/2100 AWS A-F), B8 (900); B1 (2100), B2 (1900), B5 (850), B8 (900)
2G: B2 (1900), B3 (1800), B5 (850), B8 (900); B3 (1800), B5 (850), B8 (900)