📱 Model features |
| Samsung Gear S3 frontier (4G SM-R765A) | Xiaomi Amazfit T-Rex |
Model | Gear S3 frontier (4G SM-R765A) | Amazfit T-Rex |
Other model names | AT&T Samsung Gear S3 R765A, Gear S3 frontier LTE | Mi Amazfit TRex |
Country or region available |  USA |  (Global, International) |
Brand | Samsung | Xiaomi |
Release date | 11/1/2016 | 1/9/2020, Announced: 1/1/2020 |
Depth | 12.9 millimeters (0.51 inches) | 13.5 millimeters (0.53 inches) |
Size (width x height) | 46 x 49 millimeters (1.81 x 1.93 in) | 47.47 x 47.47 millimeters (1.87 x 1.87 in) |
Weight | 63 grams (2.21 ounces) | 58 grams (2.03 ounces) |
Build, materials | Stainless steel body, glass front | Plastic body, glass front |
Protection against water and others | IP68 certified: dust/waterproof over 1.5 meters and 30min. MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. | 5 ATM: 50 meters waterproof |
🤖 Operating System |
| Samsung Gear S3 frontier (4G SM-R765A) | Xiaomi Amazfit T-Rex |
System version | Tizen 2.3.2 | Proprietary OS |
Firmware update | Tizen 3.0 | feature not registered |
User Interface | feature not registered | RTOS |
⚙️ Processor |
| Samsung Gear S3 frontier (4G SM-R765A) | Xiaomi Amazfit T-Rex |
Chipset | 64bit: Samsung Exynos 7 Dual 7270 (14nm) | 32bit |
CPU | Dual-core, 1 processor: 2x 1GHz ARM Cortex-A53 (Dual-core) | Single-core, 1 processor: Single-core |
GPU graphical controller | ARM Mali-T720 | feature not registered |
Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage |
| Samsung Gear S3 frontier (4G SM-R765A) | Xiaomi Amazfit T-Rex |
RAM memory | 768MB LPDDR3 | 512MB LPDDR3 |
Internal storage | 4GB (2GB available) | 4GB (2GB available) eMCP |
External storage | Not supported | Not supported |
📲 Display |
| Samsung Gear S3 frontier (4G SM-R765A) | Xiaomi Amazfit T-Rex |
Display type | Super AMOLED | AMOLED |
Screen size | 1.3" inches | 1.3" inches |
Screen-to-body ratio | ~24.2% (screen-to-body ratio) | ~24.2% (screen-to-body ratio) |
Display resolution | 360x360 pixels | 360x360 pixels |
Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
Pixel density (dot pitch) | 392 PPI | 392 PPI |
Colors | 16 million | 16 million |
Scratch-resistant glass | Gorilla Glass SR+ | Gorilla Glass 3 |
Refresh rate | feature not registered | 60Hz |
Display features | feature not registered | Not supported |
📶 Mobile networks |
| Samsung Gear S3 frontier (4G SM-R765A) | Xiaomi Amazfit T-Rex |
Dual-SIM | Not supported | Not supported |
SIM card | 1 slot (Single-SIM) e-SIM (Eletronic) | Not supported |
Maximum Download / Upload | 150/50 Mbps | feature not registered |
Network technology | 3G, 4G | feature not registered |
Frequency, bands | Expand band detailsCollapse details |
GSM MHz band | Not supported | Not supported |
Primary 2G network | Not supported | Not supported |
Primary 3G network | UMTS 850/1900 | Not supported |
Primary 4G network | LTE Cat4 850/1900 (Bands 2,5) | Not supported |
Primary 5G network | Not supported | Not supported |
Primary data network | UMTS, HSDPA, HSUPA, HSPA+, LTE | Not supported |
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 |
| Samsung Gear S3 frontier (4G SM-R765A) | Xiaomi Amazfit T-Rex |
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 |
| Samsung Gear S3 frontier (4G SM-R765A) | Xiaomi Amazfit T-Rex |
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 |
| Samsung Gear S3 frontier (4G SM-R765A) | Xiaomi Amazfit T-Rex |
Loudspeaker | Supported | feature not registered |
Active noise cancellation | 2 microphones or more | Not supported |
Radio | Not supported | Not supported |
TV | Not supported | Not supported |
Video formats | feature not registered | feature not registered |
Audio formats | MP3, WAV, WMA, OGG, eAAC+ | feature not registered |
🔌 Connectivity |
| Samsung Gear S3 frontier (4G SM-R765A) | Xiaomi Amazfit T-Rex |
USB | Not supported | Not supported |
Audio output | Not supported | Not supported |
TV output | Not supported | Not supported |
Bluetooth | 4.2 + A2DP | 5.0 + A2DP/LE |
WiFi | 802.11 b/g/n (2.4GHz) | Not supported |
DLNA | Not supported | Not supported |
GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging, GLONASS |
NFC | Supported | Not supported |
Infrared port | Not supported | Not supported |
🧭 Sensors |
| Samsung Gear S3 frontier (4G SM-R765A) | Xiaomi Amazfit T-Rex |
Sensors | Accelerometer Ambient Light sensor Barometer Gyroscope Heart rate Pedometer | Accelerometer Ambient Light sensor Compass Heart rate Pedometer SpO2 |
Vibrating alert | Supported | Supported |
🔋 Battery |
| Samsung Gear S3 frontier (4G SM-R765A) | Xiaomi Amazfit T-Rex |
Battery type | Li-Ion: Lithium-Ion (Non removable) | LiPo: Li-Ion polymer (Non removable) |
Battery capacity | 380 mAh | 390 mAh |
Charger, watts | Wired charging | Wired charging |
Wireless charging | Qi Wireless charging (Qi/WPC) | Magnetic charging (dock) |
Talk time autonomy | feature not registered | 20 hours |
Standby | 72 hours (3 days) | 480 hours (20 days) |
➕ Other features |
| Samsung Gear S3 frontier (4G SM-R765A) | Xiaomi Amazfit T-Rex |
Call control | Voice dialing, Voice recorder, Voice commands | Not supported |
Messaging | SMS, MMS, E-mail, Push mail | SMS (T9), E-mail |
Hands-free calling | Supported | Not supported |
Video calling | Not supported | Not supported |
Ringtones | Polyphonic and customized | feature not registered |
Web browser | Not supported | Not supported |
Antenna | Internal antenna | feature not registered |
Qwerty physical keyboard | Not supported | Not supported |
Miscellaneous | • Colors: Black • Leather band strap (22mm) • Stainless Steel body 316L • Samsung Pay • S-Voice, S-Health | • 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 |
☢️ Radiation rate |
| Samsung Gear S3 frontier (4G SM-R765A) | Xiaomi Amazfit T-Rex |
SAR 1.6W/kg (USA, Mexico, etc.) | 0.498W/kg (head), 1.005W/kg (body) | feature not registered |
SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |