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Samsung Gear S3 classic (4G SM-R775S) vs Xiaomi Amazfit T-Rex

Side by side comparison between Samsung Gear S3 classic vs Xiaomi Amazfit T-Rex smartwatches, differences, pros, cons and full specifications. What's the better?

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Compare Xiaomi Amazfit T-Rex XSamsung Gear S3 classic (4G SM-R775S)14Points
Samsung Gear S3 classic (4G SM-R775S)
1.3"
AMOLED

360x360

N/A
MP

768MB
RAM

64bit Dual

380
mAh

(Non removable)

vs
Xiaomi Amazfit T-Rex
1.3"
AMOLED

360x360

N/A
MP

512MB
RAM

32bit Single

390
mAh

(Non removable)

What's the better smartwatch? Samsung Gear S3 classic (4G SM-R775S)

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!

Gear S3 classic (4G SM-R775S)14 Advantages Samsung Gear S3 classic (4G SM-R775S)vsAmazfit T-Rex5 Advantages Xiaomi Amazfit T-Rex
+768MB LPDDR350%
More RAM memory. Typically more responsive and better for multitasking.
vs512MB LPDDR3
+57 grams (2 ounces)2%
Lighter
vs58 grams (2.03 ounces)
+12.9 millimeters (0.51 inches)5%
Thinner
vs13.5 millimeters (0.53 inches)
+Stainless steel body, glass frontAdvantage
More resistant material
vsPlastic body, glass front
+Super AMOLEDAdvantage
Super AMOLED display is brighter and more vivid
vsAMOLED
+1500 apps149 times
More apps available to download and use
vs10 apps
+4G LTEAdvantage
The 4G LTE network is newer and faster
vsNot supported
+(4G LTE) 150 MbpsAdvantage
Faster for surfing the internet and download files
vs(Not supported)
+BarometerAdvantage
Sensors help you use the device
vsNot supported
+GyroscopeAdvantage
Sensors help you use the device
vsNot supported
+Hands-free callingAdvantage
Hands-free calling is useful when you are driving and on other occasions
vsNot supported
+Active noise cancellationAdvantage
Noise-canceling microphone allows better call quality
vsNot supported
+802.11 b/g/n (2.4Ghz)Advantage
WiFi 802.11 b/g/n (2.4Ghz) is newer and faster
vsNot supported
+NFCAdvantage
NFC allows you to make payments by approach quickly and securely
vsNot supported
Not supportedvs+CompassAdvantage
Sensors help you use the device
Not supportedvs+SpO2Advantage
Sensors help you use the device
380 mAhvs+390 mAh3%
Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
4.2 + A2DPvs+5.0 + A2DP/LEAdvantage
Bluetooth 5.0 + A2DP/LE is newer and faster
IP68 certified, MIL-STD-810G military certifiedvs+5 ATMAdvantage
Protection against water allows you talk to your friends in the rain, for example

17 Common items in both devices
4GB (2GB available)
16 million
360x360 pixels
392 PPI
1.3"
Capacitive
Multitouch
+10 specs and more in the table below

Check the comparison table below for more items that are not evaluated in comparison score above.

Highlight differencesClear highlight

📱 Model features

Samsung Gear S3 classic (4G SM-R775S)Xiaomi Amazfit T-Rex
ModelGear S3 classic (4G SM-R775S)Amazfit T-Rex
Other model namesSKT Samsung Gear S3 R775S (SK Telecom), Gear S3 classicMi Amazfit TRex
Country or region availableSouth Korea
South Korea
(Global, International)
(Global, International)
BrandSamsungXiaomi
Release date11/1/20161/9/2020, Announced: 1/1/2020
Depth12.9 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)
Weight57 grams (2 ounces)58 grams (2.03 ounces)
Build, materialsStainless steel body, glass frontPlastic body, glass front
Protection against water and othersIP68 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 classic (4G SM-R775S)Xiaomi Amazfit T-Rex
System versionTizen 2.3.2Proprietary OS
Firmware updateTizen 3.0feature not registered
User Interfacefeature not registeredRTOS

⚙️ Processor

Samsung Gear S3 classic (4G SM-R775S)Xiaomi Amazfit T-Rex
Chipset64bit - Samsung Exynos 7 Dual 7270 (14nm)32bit
CPUDual-Core, 1 processor:
1GHz Dual-Core ARM Cortex-A53
Single-Core, 1 processor:
Single-Core
GPU graphical controllerARM Mali-T720feature not registered
Performance (benchmark)feature not registeredfeature not registered

💽 Memory and storage

Samsung Gear S3 classic (4G SM-R775S)Xiaomi Amazfit T-Rex
RAM memory768MB LPDDR3512MB LPDDR3
Internal storage4GB (2GB available)4GB (2GB available)
eMCP
External storageNot supportedNot supported

📲 Display

Samsung Gear S3 classic (4G SM-R775S)Xiaomi Amazfit T-Rex
Display typeSuper AMOLEDAMOLED
Screen size1.3" inches1.3" inches
Screen-to-body ratio~24.2% (screen-to-body ratio)~24.2% (screen-to-body ratio)
Display resolution360x360 pixels360x360 pixels
TouchscreenCapacitive MultitouchCapacitive Multitouch
Pixel density (dot pitch)392 PPI392 PPI
Colors16 million16 million
Scratch-resistant glassGorilla Glass SR+Gorilla Glass 3
Refresh ratefeature not registered60Hz
Display featuresfeature not registeredNot supported

📶 Mobile networks

Samsung Gear S3 classic (4G SM-R775S)Xiaomi Amazfit T-Rex
Dual-SIMNot supportedNot supported
SIM card1 slot (Single-SIM)
e-SIM (Eletronic)
Not supported
Maximum download/upload150/50 Mbpsfeature not registered
Network technology4Gfeature not registered
Frequency, bandsExpand band detailsCollapse details
GSM MHz bandNot supportedNot supported
Primary 2G networkNot supportedNot supported
Primary 3G networkNot supportedNot supported
Primary 4G networkLTE Cat4 850 (Bands 5)Not supported
Primary 5G networkNot supportedNot supported
Primary data networkLTENot supported
Secondary 2G networkNot supportedNot supported
Secondary 3G networkNot supportedNot supported
Secondary 4G networkNot supportedNot supported
Secondary data networkNot supportedNot supported

📷 Camera

Samsung Gear S3 classic (4G SM-R775S)Xiaomi Amazfit T-Rex
Back camera (main camera)Not supportedNot supported
Main camera resolutionNot supportedNot supported
Video recording (primary)Not supportedNot supported
FlashNot supportedNot supported
Focal aperturefeature not registeredfeature not registered
Focal lengthfeature not registeredfeature not registered
Sensor sizefeature not registeredfeature not registered
Pixel sizefeature not registeredfeature not registered
AutofocusNot supportedNot supported
Touch focusNot supportedNot supported
Image stabilizationNot supportedNot supported
ZoomNot supportedNot supported
Face/smile detectionNot supportedNot supported
BSI sensorNot supportedNot supported
HDRNot supportedNot supported
Camera extrasfeature not registeredfeature not registered

📸 Front camera

Samsung Gear S3 classic (4G SM-R775S)Xiaomi Amazfit T-Rex
Front camera (secondary)Not supportedNot supported
Front camera resolutionNot supportedNot supported
Video recording (secondary)Not supportedNot supported
Front flashNot supportedNot supported
Focal aperturefeature not registeredfeature not registered
Focal lengthfeature not registeredfeature not registered
Sensor sizefeature not registeredfeature not registered
Pixel sizefeature not registeredfeature not registered

🔉 Sound and multimedia

Samsung Gear S3 classic (4G SM-R775S)Xiaomi Amazfit T-Rex
LoudspeakerSupportedfeature not registered
Active noise cancellation2 microphones or moreNot supported
RadioNot supportedNot supported
TVNot supportedNot supported
Video formatsfeature not registeredfeature not registered
Audio formatsMP3, WAV, WMA, OGG, eAAC+feature not registered

🔌 Connectivity

Samsung Gear S3 classic (4G SM-R775S)Xiaomi Amazfit T-Rex
USBNot supportedNot supported
Audio outputNot supportedNot supported
TV outputNot supportedNot supported
Bluetooth4.2 + A2DP5.0 + A2DP/LE
WiFi802.11 b/g/n (2.4Ghz)Not supported
DLNANot supportedNot supported
GPSA-GPS, GeoTagging, GLONASSA-GPS, GeoTagging, GLONASS
NFCSupportedNot supported
Infrared portNot supportedNot supported

🧭 Sensors

Samsung Gear S3 classic (4G SM-R775S)Xiaomi Amazfit T-Rex
SensorsAccelerometer
Ambient Light sensor
Barometer
Gyroscope
Heart rate
Pedometer
Accelerometer
Ambient Light sensor
Compass
Heart rate
Pedometer
SpO2
Vibrating alertSupportedSupported

🔋 Battery

Samsung Gear S3 classic (4G SM-R775S)Xiaomi Amazfit T-Rex
Battery typeLi-Ion: Lithium-Ion (Non removable)LiPo: Li-Ion polymer (Non removable)
Battery capacity380 mAh390 mAh
Charger, watts Standard charging
WPC/Qi Wireless charging
Standard charging
Magnetic charging (dock)
Talk time autonomyfeature not registered20 hours
Standby72 hours (3 days)480 hours (20 days)

➕ Other features

Samsung Gear S3 classic (4G SM-R775S)Xiaomi Amazfit T-Rex
Call controlVoice dialing, Voice recorder, Voice commandsNot supported
MessagingSMS, MMS, E-mail, Push mailSMS (T9), E-mail
Hands-free callingSupportedNot supported
Video callingNot supportedNot supported
RingtonesPolyphonic and customizedfeature not registered
Web browserNot supportedNot supported
AntennaInternal antennafeature not registered
Qwerty physical keyboardNot supportedNot supported
Miscellaneous- Colors: Silver
- 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 classic (4G SM-R775S)Xiaomi Amazfit T-Rex
SAR 1.6W/kg (USA, Mexico, etc.)feature not registeredfeature not registered
SAR 2W/kg (Europe, UK, etc.)feature not registeredfeature not registered
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