📱 Model features |
| Xiaomi Amazfit T-Rex | Samsung Galaxy Watch Active 2 (40mm SM-R835F) |
| Model | Amazfit T-Rex | Galaxy Watch Active 2 (40mm SM-R835F) |
| Other model names | Mi Amazfit TRex | Galaxy Watch Active2 4G LTE SM-R835U (Stainless Steel) |
| Country or region available | 
(Global, International) |
(Global, International) |
| Brand | Xiaomi | Samsung |
| Release date | 1/9/2020, Announced: 1/1/2020 | 9/1/2019 |
| Depth | 13.5 millimeters (0.53 inches) | 10.9 millimeters (0.43 inches) |
| Size (width x height) | 47.47 x 47.47 millimeters (1.87 x 1.87 in) | 40 x 40 millimeters (1.57 x 1.57 in) |
| Weight | 58 grams (2.03 ounces) | 37 grams (1.3 ounces) |
| Build, materials | Plastic body, glass front | Stainless steel body, glass front |
| Protection against water and others | 5 ATM: 50 meters waterproof | 5 ATM: 50 meters waterproof.
MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. |
🤖 Operating System |
| Xiaomi Amazfit T-Rex | Samsung Galaxy Watch Active 2 (40mm SM-R835F) |
| System version | Proprietary OS | Tizen 4.0 |
| Firmware update | feature not registered | feature not registered |
| User Interface | RTOS | feature not registered |
⚙️ Processor |
| Xiaomi Amazfit T-Rex | Samsung Galaxy Watch Active 2 (40mm SM-R835F) |
| Chipset | 32bit | 64bit: Samsung Exynos 9 Dual 9110 (10nm) |
| CPU | Single-core, 1 processor:
Single-core | Dual-core, 1 processor:
2x 1.15GHz ARM Cortex-A53 (Dual-core) |
| GPU graphical controller | feature not registered | ARM Mali-T720 MP1 |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage |
| Xiaomi Amazfit T-Rex | Samsung Galaxy Watch Active 2 (40mm SM-R835F) |
| RAM memory | 512MB LPDDR3 | 1.5GB LPDDR3 |
| Internal storage | 4GB (2GB available)
eMCP | 4GB (1.39GB available)
eMMC |
| External storage | Not supported | Not supported |
📲 Display |
| Xiaomi Amazfit T-Rex | Samsung Galaxy Watch Active 2 (40mm SM-R835F) |
| Display type | AMOLED | Super AMOLED |
| Screen size | 1.3" inches | 1.2" inches |
| Screen-to-body ratio | ~24.2% (screen-to-body ratio) | ~29% (screen-to-body ratio) |
| Display resolution | 360x360 pixels | 360x360 pixels (1:1) |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 392 PPI | 424 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass 3 | Gorilla Glass DX+ |
| Refresh rate | 60Hz | feature not registered |
| Display features | Not supported | Not supported |
📶 Mobile networks |
| Xiaomi Amazfit T-Rex | Samsung Galaxy Watch Active 2 (40mm SM-R835F) |
| Dual-SIM | Not supported | Not supported |
| SIM card | Not supported | 1 slot (Single-SIM)
e-SIM (Eletronic) |
| Maximum Download / Upload | feature not registered | 150/50 Mbps |
| Network technology | feature not registered | 2G, 3G, 4G |
| Frequency, bands | Expand band detailsCollapse details |
| GSM MHz band | Not supported | Quad-Band 850/900/1800/1900 |
| Primary 2G network | Not supported | GSM 850/900/1800/1900 |
| Primary 3G network | Not supported | UMTS 850/900/2100 |
| Primary 4G network | Not supported | LTE Cat4 (1, 3, 5, 7, 8, 20) |
| Primary 5G network | Not supported | Not supported |
| Primary data network | Not supported | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE |
| Secondary 2G network | Not supported | Not supported |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | Not supported | Not supported |
📷 Camera |
| Xiaomi Amazfit T-Rex | Samsung Galaxy Watch Active 2 (40mm SM-R835F) |
| Back camera (main camera) | Not supported | Not supported |
| Main camera resolution | Not supported | Not supported |
| Video recording (primary) | Not supported | Not supported |
| Flash | Not supported | Not supported |
| Focal aperture | feature not registered | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | feature not registered | feature not registered |
| Autofocus | Not supported | Not supported |
| Touch focus | Not supported | Not supported |
| Image stabilization | Not supported | Not supported |
| Zoom | Not supported | Not supported |
| Face/smile detection | Not supported | Not supported |
| BSI sensor | Not supported | Not supported |
| HDR | Not supported | Not supported |
| Camera extras | feature not registered | feature not registered |
📸 Front camera |
| Xiaomi Amazfit T-Rex | Samsung Galaxy Watch Active 2 (40mm SM-R835F) |
| Front camera (secondary) | Not supported | Not supported |
| Front camera resolution | Not supported | Not supported |
| Video recording (secondary) | Not supported | Not supported |
| Front flash | Not supported | Not supported |
| Focal aperture | feature not registered | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | feature not registered | feature not registered |
🔉 Sound and multimedia |
| Xiaomi Amazfit T-Rex | Samsung Galaxy Watch Active 2 (40mm SM-R835F) |
| Loudspeaker | feature not registered | Supported |
| Active noise cancellation | Not supported | Not supported |
| Radio | Not supported | Not supported |
| TV | Not supported | Not supported |
| Video formats | feature not registered | MP4 |
| Audio formats | feature not registered | MP3, WAV, WMA, OGG, eAAC+ |
🔌 Connectivity |
| Xiaomi Amazfit T-Rex | Samsung Galaxy Watch Active 2 (40mm SM-R835F) |
| USB | Not supported | Not supported |
| Audio output | Not supported | Not supported |
| TV output | Not supported | Not supported |
| Bluetooth | 5.0 + A2DP/LE | 5.0 + A2DP/LE |
| WiFi | Not supported | 802.11 b/g/n (2.4GHz) |
| DLNA | Not supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou |
| NFC | Not supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors |
| Xiaomi Amazfit T-Rex | Samsung Galaxy Watch Active 2 (40mm SM-R835F) |
| Sensors | Accelerometer
Ambient Light sensor
Compass
Heart rate
Pedometer
SpO2 | Accelerometer
Ambient Light sensor
Barometer
Heart rate
Pedometer |
| Vibrating alert | Supported | Supported |
🔋 Battery |
| Xiaomi Amazfit T-Rex | Samsung Galaxy Watch Active 2 (40mm SM-R835F) |
| Battery type | LiPo: Li-Ion polymer (Non removable) | Li-Ion: Lithium-Ion (Non removable) |
| Battery capacity | 390 mAh | 247 mAh |
| Charger, watts | Wired charging | Wired charging |
| Wireless charging | Magnetic charging (dock) | Qi wireless charging |
| Talk time autonomy | 20 hours | 43 hours (1.8 days) |
| Standby | 480 hours (20 days) | feature not registered |
➕ Other features |
| Xiaomi Amazfit T-Rex | Samsung Galaxy Watch Active 2 (40mm SM-R835F) |
| Call control | Not supported | Voice dialing, Voice recorder, Voice commands |
| Messaging | SMS (T9), E-mail | SMS (T9), MMS, E-mail, Push mail |
| Hands-free calling | Not supported | Supported |
| Video calling | Not supported | Not supported |
| Ringtones | feature not registered | Polyphonic and customized |
| Web browser | Not supported | Not supported |
| Antenna | feature not registered | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: Black, Gray, Camouflage, Army green, Khaki
• Watch band: 22mm
• BioTracker PPG
• 14 sports mode
• AppZepp app
• Compatible with Android 5.0/iOS 10 and above | • Colors: Black, Silver, Pink Gold
• Bands: 20mm
• Always-on display
• Samsung Pay |
☢️ Radiation rate |
| Xiaomi Amazfit T-Rex | Samsung Galaxy Watch Active 2 (40mm SM-R835F) |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | 0.255W/kg (head), 1.528W/kg (body) |