fossibot F109S vs Xiaomi Redmi 15 4G

At a glance

Brand: Fossibot; Xiaomi
Release date: June 2025, 11 months ago; August 2025, 9 months ago
AnTuTu: 245.076 Antutu v10 Overall performance better than 58% of devices; 338.000 Antutu v10 Overall performance better than 63% of devices

Size: 6.74"; 6.9"
Resolution: 720 x 1620 px HD+; 1080 x 2340 px FHD+
Type: LCD IPS; LCD IPS
Density: 269 ppi Medium Density; 374 ppi High Density
Aspect ratio: 20:9; 20:9
Features: Water Drop Notch, Refresh rate 120 Hz, Scratch resistant, Capacitive, Multi-touch; Hole-punch Notch, TUV Rheinland Low Blue Light, TÜV Rheinland Flicker-free Certified, Refresh rate 144 Hz, Brightnes 700 cd/m² (typ), TÜV Rheinland Eye Comfort Certification, DCI-P3, Scratch resistant, Capacitive, Multi-touch, Frameless

Chipset: MediaTek Helio G81 (MT6769); Qualcomm Snapdragon 685 (SM6225)
CPU: 2x Cortex A75 2.0 GHz + 6x Cortex A55 1.7 GHz; 4x2.8 GHz Cortex A73 + 4x1.9GHz Cortex A53
CPU type: Octa-Core; Octa-Core
Process: 12 nm; 6 nm
Frequency: 2 GHz; 2.8 GHz
GPU: ARM Mali-G52 MC2; Adreno 610
RAM: 6 GB; 6 GB
RAM type: LPDDR4X RAM; LPDDR4X RAM
64-bit: Yes; Yes

Resolution: 50 Mpx; 50 Mpx
Aperture: ƒ/ 1.8; ƒ/ 1.8
Sensor: Hynix Hi-5021Q; —
Pixel size: 0.70 µm; —
Sensor size: 1/2.55"; —
Flash: Dual LED; LED
Optical stabilization: No; No
Slow motion: No, 30 fps; Yes, 60 fps
Features: 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, Night Mode, Night Vision; Digital zoom, Triple camera, Digital image stabilization, Autofocus, Touch focus, Continuous shooting, Geotagging, Panorama, HDR, Face detection, White balance settings, ISO settings, Exposure compensation, Scene mode, Self-timer

Capacity: 256 GB; 128 GB
Type: UFS Storage 2.2; UFS Storage 2.2
SD slot: Yes , Slot for SD or second SIM card; Yes , Slot for SD or second SIM card

Dimensions: 81.7 mm 176.1 mm 18.5 mm Print 3D Model; 82.1 mm 171.1 mm 8.0 mm Print 3D Model
Weight: 380 g; 224 g
Materials: Rugged Smartphone, Polycarbonate; Plastic
Colors: Red Gray; Black Silver Violet
Water/dust resistance: IP68, IP69 , MIL-STD-810H; IP64
Drop resistance: Class A B C D E 270 drops without defects; Class A B C D E 270 drops without defects
Repairability: Class A B C D E; Class A B C D E
Usable surface: 75 %; 83 %

Operating system: Android 14 Upside-down cake Android 14; Android 16 HyperOS 3.X (Android 16)
Google services: With Google Mobile Services; With Google Mobile Services
Updates: —; OS updates: 5 years

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 5.1 LELow energy consumption
Bluetooth profiles: A2DP (Advanced Audio Distribution Profile), LE (Low Energy); A2DP (Advanced Audio Distribution Profile), LE (Low Energy), APT-x, LDAC, SBC, AAC
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; 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, A-GPS, GLONASS, Beidou, Galileo

5G: n1 (2100), n3 (1800), n5 (850), n8 (900), n20 (800), n28b (700), n28a (700), n38 (2600), n41 (2500), n77 (3700), n78 (3500); —
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), B38 (TDD 2600), B40 (TDD 2300), B41 (TDD 2500), B66 (1700/2100), B71 (600); 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: B2 (1900), B3 (1800), B5 (850), B8 (900); B2 (1900), B3 (1800), B5 (850), B8 (900)