Doogee Fire 3 Ultra, 6GB 256GB, 5.5 LCD IPS HD+, 8350mAh, Green

This handset pairs an 8350 mAh cell that comfortably handles even the toughest days with a 5.5" body built for single-handed use, plus IP68/IP69K and MIL-STD-810H certification. It refuses to compromise on compactness, nor on toughness or battery life. Thanks to 24 GB of dynamic RAM (6 GB physical + 18 GB virtual) working alongside the Unisoc T7200 chipset, Android 15 runs smoothly even with multiple power-hungry apps in play.

Small yet mighty performance

The 1.6GHz octa-core CPU, paired with LPDDR4X memory and 256GB of UFS storage that can be expanded to 2TB, provides reliable performance for casual gaming, GPS navigation or work-related multitasking, while the 12nm manufacturing process keeps energy use in check.

Rugged credentials in a manageable frame

At 290 g and 162.5 × 77.4 × 17.8 mm, it is a modest size for a "rugged" handset. The chassis survives a 1.5 m drop and 30 minutes submerged at 1.5 m, with no extra case required.

Cameras with night vision

On the back, a 16 MP main sensor sits alongside a 20 MP infrared camera that captures clear images in complete darkness; up front, an 8 MP selfie shooter with HDR. 1080p/30 fps recording and an integrated IR torch round things off.

Huge endurance and quick top-ups

The 8350 mAh unit delivers as much as 91 h of mixed usage; when charging is needed, the USB-C port accepts 18 W and refills the battery in roughly two hours. Battery-share mode lets the port double as a power bank for other devices.

Current software and complete connectivity

Android 15 ships free of bloatware and with promised OTA updates. You also get NFC with Google Pay, Bluetooth 5.0, dual-band Wi-Fi ac, FM radio and a 3.5mm jack. A side-mounted fingerprint reader and face unlock add extra convenience.

What our experts think

Set against the Doogee Fire 3 Pro (16GB virtual RAM and 128GB), the Fire 3 Ultra doubles the storage and boosts dynamic memory, a difference you notice when launching games and multitasking. Next to an Ulefone Armor X12 Pro or an Oukitel WP18, the screen is smaller, yet it weighs less and the night camera is an advantage outdoors. The absence of 5G and 18 W charging are fair trade-offs for its compact build. On balance, the Doogee Fire 3 Ultra offers outstanding value for money for anyone after an ultra-rugged phone with a big battery and compact dimensions, giving up only premium multimedia features.

Technical Specifications System Operating system: Android 15 Processor: Octa Core, Unisoc T7200 - 2x 1.6 GHz Cortex-A75 + 6x 1.6 GHz Cortex-A55 Graphics: ARM Mali-G57 RAM: 6 GB (+18 GB virtual) Internal memory: 256 GB SD card: Yes, up to 2 TB SIM: DualSim Card type: Nano SIM / Nano SIM Language: Multi Language (Includes Spanish and Portuguese) Play Store: Yes Display Features: 5.5" LCD IPS Definition: HD+ Resolution: 720 x 1440 pixels Density: 293 ppi Refresh rate: 90 Hz Camera Front: 8 MP Rear: 16 MP + 20 MP IR Night Vision Camera Flash: Yes Supported formats Audio: AAC, AAC+ / aacPlus / HE-AAC v1, AMR / AMR-NB / GSM-AMR, AMR-WB, eAAC+ / aacPlus v2 / HE-AAC v2, FLAC, MIDI, MP3, OGG, WMA, WAV, ALAC, APE Video: 3GPP, AVI, Flash Video, H.263, H.264 / MPEG-4 Part 10 / AVC video, MKV, MP4, WebM, WMV, Xvid, MOV, ASF, RM, Images: gif, jpeg, png, bmp Sensors Accelerometer: Yes Proximity: Yes Light: Yes Fingerprint reader: Yes Connectivity 2G (GSM) networks: 850-900-1800-1900 MHz 3G (WCDMA) networks: 850-900-1700-1900-2100 MHz 4G (LTE) networks: 700-800-850-900-1700-1800-1900-2100-2600 MHz 5G networks (NR): No Wifi: a, b, g, n, n 5GHz, ac, Wi-Fi 5, Wi-Fi Hotspot, Wi-Fi Direct, Wi-Fi Display. Bluetooth: 5.0 FM Radio: Yes GPS: GPS, A-GPS, GLONASS, BeiDou, Galileo Regional locking: No Quad-band: Yes USB: USB-C NFC: Yes Dimensions Inches: 5,5 Size: 162.5 x 77.4 x 17.8 mm Weight: 290 g Battery Capacity: 8350 mAh Fast charging: 18 W Box Contents 1 x Doogee Fire 3 Ultra 6GB/256GB Green Rugged 1 x Charger 1 x USB-C Cable 1 x Tempered glass screen protector 1 x User manual