Unihertz 8849 Tank X vs Vivo Y21d

At a glance

Brand: Unihertz; vivo
Release date: February 2026, 4 months ago; November 2025, 7 months ago
AnTuTu: 885.456 Antutu v10 Overall performance better than 83% of devices; 222.000 Antutu v10 Overall performance better than 56% of devices

Size: 6.78"; 6.68"
Resolution: 1080 x 2460 px FHD+; 720 x 1608 px HD+
Type: LCD IPS; LCD IPS
Density: 396 ppi High Density; 264 ppi Medium Density
Aspect ratio: 21:9; 20:9
Features: Hole-punch Notch, Youji Glass - 1.1 mm, Refresh rate 120 Hz, Peak brightness - 750 cd/m², Scratch resistant, Capacitive, Multi-touch, In-cell; Hole-punch Notch, Refresh rate 90 Hz, Peak brightness - 1000 cd/m², Max brightness HBM - 1000 cd/m², TÜV Rheinland Eye Comfort Certification, DCI-P3, 83% NTSC, LED Notifications, 2.5D curved glass screen, Capacitive, Multi-touch, Frameless

Chipset: MediaTek Dimensity 8200 (MT6896); Unisoc Tiger T612 / T7225
CPU: 1x Cortex A78 3.1 GHz + 3x Cortex A78 3.0 GHz + 4x Cortex A55 2.0 GHz; 2 x ARM Cortex A75 1.8Ghz + 6 x ARM Cortex A55 1.8Ghz
CPU type: Octa-Core; Octa-Core
Process: 4 nm; 12 nm
Frequency: 3.1 GHz; 1.8 GHz
GPU: Arm Mali-G610 MC6; Mali-G57 MP1
RAM: 16 GB; 4 GB
RAM type: RAM LPDDR5; LPDDR4X RAM
64-bit: Yes; Yes

Resolution: 50 Mpx; 50 Mpx
Aperture: ƒ/ 1.88; ƒ/ 1.8
Sensor: Sony IMX766; —
Pixel size: 1.00 µm; —
Sensor size: 1/1.56"; —
Flash: Dual LED; Dual LED
Optical stabilization: No; No
Slow motion: No, 30 fps; Yes, 120 fps
Features: Digital zoom, Triple camera, Digital image stabilization, 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, Night Vision; 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: 86.0 mm 179.0 mm 25.0 mm Print 3D Model; 77.0 mm 166.1 mm 8.4 mm Print 3D Model
Weight: 750 g; 209 g
Materials: Polycarbonate; Plastic , Splash resistant design
Colors: Black; Green Coral
Water/dust resistance: IP68, MIL-STD-810H; IP68, IP69
Usable surface: 71 %; 83 %

Operating system: Android 15 Android 15; Android 15 Funtouch OS 15 (Android 15)
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 5.3 LELow energy consumption; Bluetooth 5.2 LELow energy consumption
Bluetooth profiles: A2DP (Advanced Audio Distribution Profile), EDR (Enhanced Data Rate), LE (Low Energy), HS; A2DP (Advanced Audio Distribution Profile), EDR (Enhanced Data Rate), 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: 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, QZSS, Galileo

5G: n1 (2100), n2 (1900 PCS), n12 (700), n20 (800), n25 (1900), n28b (700), n28a (700); —
4G LTE: B1 (2100), B2 (1900), B3 (1800), B4 (1700/2100 AWS 1), B5 (850), B7 (2600), B8 (900), B12 (700), B13 (700), B17 (700), B18 (800), B19 (800), B20 (800), B25 (1900+), 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), B5 (850), B6 (800), B8 (900), B19 (800); B1 (2100), B5 (850), B8 (900)
2G: CDMA BC0 (800), CDMA BC1 (1900), B2 (1900), B3 (1800), B5 (850), B8 (900); B3 (1800), B5 (850), B8 (900)