Xiaomi Amazfit T-Rex vs Samsung Gear S2 (3G SM-R730A)
Side by side comparison between Xiaomi Amazfit T-Rex vs Samsung Gear S2 smartwatches, differences, pros, cons and full specifications. What's the better?
,
1.3"
AMOLED
AMOLED
360x360
N/A
512MB
RAM
RAM
Single-core
390
mAh
mAh
(Non removable)
vs
1.2"
AMOLED
AMOLED
360x360
N/A
512MB
RAM
RAM
Dual-core
300
mAh
mAh
(Non removable)
What's the better smartwatch? Samsung Gear S2 (3G SM-R730A)
The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!
7 Advantages 
12 Advantages | 14 Common items in both devices |
| 512MB LPDDR3 / 512MB |
| 4GB (2GB available) |
| 16 million |
| 360x360 pixels |
| Capacitive |
| Multitouch |
| Accelerometer |
| +7 specs and more in the table below |
Check the comparison table below for more items that are not evaluated in comparison score above.
Highlight differences Clear highlight📱 Model features | ||
| Amazfit T-Rex | Samsung Gear S2 (3G SM-R730A) | |
| Change model | ||
| Model | Amazfit T-Rex | Gear S2 (3G SM-R730A) |
| Other model names | Mi Amazfit TRex | AT&T Samsung Gear S2 SM-R730A, Samsung Orbis |
| Country or region available |  (Global, International) |  USA |
| Brand | Xiaomi | Samsung |
| Release date | 1/9/2020, Announced: 1/1/2020 | 11/1/2015 |
| Depth | 13.5 millimeters (0.53 inches) | 13.4 millimeters (0.53 inches) |
| Size (width x height) | 47.47 x 47.47 millimeters (1.87 x 1.87 in) | 44 x 51.8 millimeters (1.73 x 2.04 in) |
| Weight | 58 grams (2.03 ounces) | 51 grams (1.79 ounces) |
| Build, materials | Plastic body, glass front | feature not registered |
| Protection against water and others | 5 ATM: 50 meters waterproof | Waterproof (IP?) |
📲 Display | ||
| Amazfit T-Rex | Samsung Gear S2 (3G SM-R730A) | |
| Display type | AMOLED | Super AMOLED |
| Screen size | 1.3" inches | 1.2" inches |
| Screen-to-body ratio | ~24.2% (screen-to-body ratio) | ~20.4% (screen-to-body ratio) |
| Display resolution | 360x360 pixels | 360x360 pixels |
| 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 3 |
| Refresh rate | 60Hz | feature not registered |
| Display features | Not supported | feature not registered |
🤖 Operating System | ||
| Amazfit T-Rex | Samsung Gear S2 (3G SM-R730A) | |
| System version | Proprietary OS | Tizen 2.3 |
| Firmware update | feature not registered | Tizen 2.3.2 |
| User Interface | RTOS | feature not registered |
⚙️ Processor | ||
| Amazfit T-Rex | Samsung Gear S2 (3G SM-R730A) | |
| Chipset | 32bit | 32bit: Qualcomm Snapdragon 400 MSM8x26 |
| CPU | Single-core, 1 processor: Single-core | Dual-core, 1 processor: 2x 1GHz ARM Cortex-A7 (Dual-core) |
| GPU graphical controller | feature not registered | Qualcomm Adreno 305 |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Amazfit T-Rex | Samsung Gear S2 (3G SM-R730A) | |
| RAM memory | 512MB LPDDR3 | 512MB |
| Internal storage | 4GB (2GB available) eMCP | 4GB (2GB available) |
| External storage | Not supported | Not supported |
📶 Mobile networks | ||
| Amazfit T-Rex | Samsung Gear S2 (3G SM-R730A) | |
| Dual-SIM | Not supported | Not supported |
| SIM card | Not supported | 1 slot (Single-SIM) e-SIM (Eletronic) |
| Maximum Download / Upload | feature not registered | 21/5.76 Mbps |
| Network technology | feature not registered | 2G, 3G |
| Frequency, bands | Expand band details Collapse details | |
| GSM MHz band | Not supported | Dual-Band 850/1900 |
| Primary 2G network | Not supported | GSM 850/1900 |
| Primary 3G network | Not supported | UMTS 850/1900 |
| Primary 4G network | Not supported | Not supported |
| Primary 5G network | Not supported | Not supported |
| Primary data network | Not supported | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+ |
| 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 | ||
| Amazfit T-Rex | Samsung Gear S2 (3G SM-R730A) | |
| 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 | feature not registered |
| 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 | ||
| Amazfit T-Rex | Samsung Gear S2 (3G SM-R730A) | |
| 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 | ||
| Amazfit T-Rex | Samsung Gear S2 (3G SM-R730A) | |
| 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 | feature not registered |
| Audio formats | feature not registered | MP3, WAV, WMA, eAAC+ |
🔌 Connectivity | ||
| Amazfit T-Rex | Samsung Gear S2 (3G SM-R730A) | |
| USB | Not supported | Not supported |
| Audio output | Not supported | Not supported |
| TV output | Not supported | Not supported |
| Bluetooth | 5.0 + A2DP/LE | 4.1 + A2DP |
| WiFi | Not supported | 802.11 b/g/n [wifi4] (2.4GHz) |
| DLNA | Not supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging |
| NFC | Not supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Amazfit T-Rex | Samsung Gear S2 (3G SM-R730A) | |
| Sensors | Accelerometer Ambient light sensor Compass Heart rate Pedometer SpO2 | Accelerometer Ambient light sensor Barometer Gyroscope Heart rate |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Amazfit T-Rex | Samsung Gear S2 (3G SM-R730A) | |
| Battery type | LiPo: li-ion polymer (Non removable) | Li-Ion: lithium-ion (Non removable) |
| Battery capacity | 390 mAh | 300 mAh |
| Charger, watts | Wired charging | Wired charging |
| Inductive / wireless charging | Magnetic charging (dock) | feature not registered |
| Talk time autonomy | 20 hours | 5 hours |
| Standby | 480 hours (20 days) | 48 hours (2 days) |
➕ Other features | ||
| Amazfit T-Rex | Samsung Gear S2 (3G SM-R730A) | |
| Call control | Not supported | Voice dialing, Voice recorder, Voice commands |
| Messaging | SMS (T9), E-mail | SMS, MMS, E-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, White • Stainless Steel body • Samsung Pay • S-Voice, S-Health • Wireless Charging (Qi) • IP68 certified: dust and water resistant up to 1.5m and 30min |
☢️ Radiation rate | ||
| Amazfit T-Rex | Samsung Gear S2 (3G SM-R730A) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | 0.737W/kg (head), 0.893W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |