Samsung Gear S (CDMA SM-R750P) vs Xiaomi Amazfit T-Rex
Side by side comparison between Samsung Gear S vs Xiaomi Amazfit T-Rex smartwatches, differences, pros, cons and full specifications. What's the better?
,
2"
AMOLED
AMOLED
360x480
N/A
512MB
RAM
RAM
Dual-core
300
mAh
mAh
(Non removable)
vs
1.3"
AMOLED
AMOLED
360x360
N/A
512MB
RAM
RAM
Single-core
390
mAh
mAh
(Non removable)
What's the better smartwatch? Samsung Gear S (CDMA SM-R750P)
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!
13 Advantages 
7 Advantages | 13 Common items in both devices |
| 512MB / 512MB LPDDR3 |
| 4GB (2GB available) |
| 16 million |
| Capacitive |
| Multitouch |
| Accelerometer |
| Ambient light sensor |
| +6 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 | ||
| Samsung Gear S (CDMA SM-R750P) | Amazfit T-Rex | |
| Model | Gear S (CDMA SM-R750P) | Amazfit T-Rex |
| Other model names | Sprint Samsung Gear S SM-R750P, Samsung SM-R750P | Mi Amazfit TRex |
| Country or region available |  USA |  (Global, International) |
| Brand | Samsung | Xiaomi |
| Release date | 11/1/2014 | 1/9/2020, Announced: 1/1/2020 |
| Depth | 12.5 millimeters (0.49 inches) | 13.5 millimeters (0.53 inches) |
| Size (width x height) | 39.9 x 58.1 millimeters (1.57 x 2.29 in) | 47.47 x 47.47 millimeters (1.87 x 1.87 in) |
| Weight | 67 grams (2.35 ounces) | 58 grams (2.03 ounces) |
| Build, materials | feature not registered | Plastic body, glass front |
| Protection against water and others | Waterproof (IP?) | 5 ATM: 50 meters waterproof |
📲 Display | ||
| Samsung Gear S (CDMA SM-R750P) | Amazfit T-Rex | |
| Display type | Super AMOLED | AMOLED |
| Screen size | 2" inches | 1.3" inches |
| Screen-to-body ratio | ~53.4% (screen-to-body ratio) | ~24.2% (screen-to-body ratio) |
| Display resolution | 360x480 pixels | 360x360 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 300 PPI | 392 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass 3 | Gorilla Glass 3 |
| Refresh rate | feature not registered | 60Hz |
| Display features | feature not registered | Not supported |
🤖 Operating System | ||
| Samsung Gear S (CDMA SM-R750P) | Amazfit T-Rex | |
| System version | Tizen 2.3 | Proprietary OS |
| Firmware update | feature not registered | feature not registered |
| User Interface | feature not registered | RTOS |
⚙️ Processor | ||
| Samsung Gear S (CDMA SM-R750P) | Amazfit T-Rex | |
| Chipset | 32bit: Samsung Exynos 4212 | 32bit |
| CPU | Dual-core, 1 processor: 2x 1GHz ARM Cortex-A9 (Dual-core) | Single-core, 1 processor: Single-core |
| GPU graphical controller | ARM Mali-400 MP4 400Mhz | feature not registered |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Samsung Gear S (CDMA SM-R750P) | Amazfit T-Rex | |
| RAM memory | 512MB | 512MB LPDDR3 |
| Internal storage | 4GB (2GB available) | 4GB (2GB available) eMCP |
| External storage | Not supported | Not supported |
📶 Mobile networks | ||
| Samsung Gear S (CDMA SM-R750P) | Amazfit T-Rex | |
| Dual-SIM | Not supported | Not supported |
| SIM card | 1 slot (Single-SIM) nano-SIM (4FF) | Not supported |
| Maximum Download / Upload | 3.1 Mbps | feature not registered |
| Network technology | 2G, 3G | feature not registered |
| Frequency, bands | Expand band details Collapse details | |
| GSM MHz band | Not supported | Not supported |
| Primary 2G network | CDMA 800/1900 | Not supported |
| Primary 3G network | CDMA2000 1xEV-DO | Not supported |
| Primary 4G network | Not supported | Not supported |
| Primary 5G network | Not supported | Not supported |
| Primary data network | CDMA2000 EV-DO Rev A | 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 S (CDMA SM-R750P) | 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 | feature not registered | 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 S (CDMA SM-R750P) | 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 S (CDMA SM-R750P) | Amazfit T-Rex | |
| Loudspeaker | Supported | feature not registered |
| 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 | MP3, WAV, WMA, eAAC+ | feature not registered |
🔌 Connectivity | ||
| Samsung Gear S (CDMA SM-R750P) | Amazfit T-Rex | |
| USB | MicroUSB 2.0 | Not supported |
| Audio output | Not supported | Not supported |
| TV output | Not supported | Not supported |
| Bluetooth | 4.1 + A2DP | 5.0 + A2DP/LE |
| WiFi | 802.11 b/g/n [wifi4] (2.4GHz) | Not supported |
| DLNA | Not supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging, GLONASS |
| NFC | Not supported | Not supported |
| Infrared port | Supported | Not supported |
🧭 Sensors | ||
| Samsung Gear S (CDMA SM-R750P) | Amazfit T-Rex | |
| Sensors | Accelerometer Ambient light sensor Barometer Compass Gyroscope Heart rate Proximity sensor UV radiation | Accelerometer Ambient light sensor Compass Heart rate Pedometer SpO2 |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Samsung Gear S (CDMA SM-R750P) | Amazfit T-Rex | |
| Battery type | Li-Ion: lithium-ion (Non removable) | LiPo: li-ion polymer (Non removable) |
| Battery capacity | 300 mAh | 390 mAh |
| Charger, watts | Wired charging | Wired charging |
| Inductive / wireless charging | feature not registered | Magnetic charging (dock) |
| Talk time autonomy | 5 hours | 20 hours |
| Standby | 96 hours (4 days) | 480 hours (20 days) |
➕ Other features | ||
| Samsung Gear S (CDMA SM-R750P) | Amazfit T-Rex | |
| Call control | Voice dialing, Voice recorder, Voice commands | Not supported |
| Messaging | SMS (T9), E-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 • S-Voice • S-Health • IP67 certified: dust and water resistant up to 1 meter and 30min | • 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 S (CDMA SM-R750P) | Amazfit T-Rex | |
| SAR 1.6W/kg (USA, Mexico, etc.) | 0.81W/kg (head), 1.07W/kg (body) | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |