Skip to content

Xiaomi Amazfit T-Rex vs Samsung Galaxy Watch Active 2 (40mm SM-R835U)

Side by side comparison between Xiaomi Amazfit T-Rex vs Samsung Galaxy Watch Active 2 smartwatches, differences, pros, cons and full specifications. What's the better?

,
Xiaomi Amazfit T-Rex
1.3"
AMOLED

360x360

N/A
MP

512MB
RAM

32bit Single

390
mAh

(Non removable)

vs
14PointsSamsung Galaxy Watch Active 2 (40mm SM-R835U)Compare Xiaomi Amazfit T-Rex X
Samsung Galaxy Watch Active 2 (40mm SM-R835U)
1.2"
AMOLED

360x360

N/A
MP

1.5GB
RAM

64bit Dual

247
mAh

(Non removable)

What's the better smartwatch? Samsung Galaxy Watch Active 2 (40mm SM-R835U)

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!

Amazfit T-Rex5 Advantages Xiaomi Amazfit T-RexvsGalaxy Watch Active 2 (40mm SM-R835U)14 Advantages Samsung Galaxy Watch Active 2 (40mm SM-R835U)
+4GB (2GB available)44%
More internal storage for applications and files
vs4GB (1.39GB available)
+1.3"8%
Larger screen
vs1.2"
+CompassAdvantage
Sensors help you use the device
vsNot supported
+SpO2Advantage
Sensors help you use the device
vsNot supported
+390 mAh58%
Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
vs247 mAh
512MB LPDDR3vs+1.5GB LPDDR32 times
More RAM memory. Typically more responsive and better for multitasking.
58 grams (2.03 ounces)vs+37 grams (1.3 ounces)57%
Lighter
13.5 millimeters (0.53 inches)vs+10.9 millimeters (0.43 inches)24%
Thinner
Plastic body, glass frontvs+Stainless steel body, glass frontAdvantage
More resistant material
AMOLEDvs+Super AMOLEDAdvantage
Super AMOLED display is brighter and more vivid
392 PPIvs+424 PPI8%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
10 appsvs+1500 apps149 times
More apps available to download and use
Not supportedvs+4G LTEAdvantage
The 4G LTE network is newer and faster
(Not supported) vs+(4G LTE) 150 MbpsAdvantage
Faster for surfing the internet and download files
Not supportedvs+BarometerAdvantage
Sensors help you use the device
Not supportedvs+VO2 maxAdvantage
Sensors help you use the device
Not supportedvs+Hands-free callingAdvantage
Hands-free calling is useful when you are driving and on other occasions
Not supportedvs+802.11 b/g/n (2.4Ghz)Advantage
WiFi 802.11 b/g/n (2.4Ghz) is newer and faster
Not supportedvs+NFCAdvantage
NFC allows you to make payments by approach quickly and securely

17 Common items in both devices
eMCP / eMMC
16 million
360x360 pixels
Capacitive
Multitouch
Accelerometer
Ambient Light sensor
+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

Xiaomi Amazfit T-RexSamsung Galaxy Watch Active 2 (40mm SM-R835U)
ModelAmazfit T-RexGalaxy Watch Active 2 (40mm SM-R835U)
Other model namesMi Amazfit TRexGalaxy Watch Active2 4G LTE SM-R835U (Stainless Steel)
Country or region available(Global, International)
(Global, International)
USA
USA
BrandXiaomiSamsung
Release date1/9/2020, Announced: 1/1/20209/1/2019
Depth13.5 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)
Weight58 grams (2.03 ounces)37 grams (1.3 ounces)
Build, materialsPlastic body, glass frontStainless steel body, glass front
Protection against water and others5 ATM: 50 meters waterproof5 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-RexSamsung Galaxy Watch Active 2 (40mm SM-R835U)
System versionProprietary OSTizen 4.0
Firmware updatefeature not registeredfeature not registered
User InterfaceRTOSfeature not registered

⚙️ Processor

Xiaomi Amazfit T-RexSamsung Galaxy Watch Active 2 (40mm SM-R835U)
Chipset32bit64bit - Samsung Exynos 9 Dual 9110 (10nm)
CPUSingle-Core, 1 processor:
Single-Core
Dual-Core, 1 processor:
1.15GHz Dual-Core ARM Cortex-A53
GPU graphical controllerfeature not registeredARM Mali-T720 MP1
Performance (benchmark)feature not registeredfeature not registered

💽 Memory and storage

Xiaomi Amazfit T-RexSamsung Galaxy Watch Active 2 (40mm SM-R835U)
RAM memory512MB LPDDR31.5GB LPDDR3
Internal storage4GB (2GB available)
eMCP
4GB (1.39GB available)
eMMC
External storageNot supportedNot supported

📲 Display

Xiaomi Amazfit T-RexSamsung Galaxy Watch Active 2 (40mm SM-R835U)
Display typeAMOLEDSuper AMOLED
Screen size1.3" inches1.2" inches
Screen-to-body ratio~24.2% (screen-to-body ratio)~29% (screen-to-body ratio)
Display resolution360x360 pixels360x360 pixels (1:1)
TouchscreenCapacitive MultitouchCapacitive Multitouch
Pixel density (dot pitch)392 PPI424 PPI
Colors16 million16 million
Scratch-resistant glassGorilla Glass 3Gorilla Glass DX+
Refresh rate60Hzfeature not registered
Display featuresNot supportedNot supported

📶 Mobile networks

Xiaomi Amazfit T-RexSamsung Galaxy Watch Active 2 (40mm SM-R835U)
Dual-SIMNot supportedNot supported
SIM cardNot supported1 slot (Single-SIM)
e-SIM (Eletronic)
Maximum download/uploadfeature not registered150/50 Mbps
Network technologyfeature not registered2G, 3G, 4G
Frequency, bandsExpand band detailsCollapse details
GSM MHz bandNot supportedQuad-Band 850/900/1800/1900
Primary 2G networkNot supportedGSM 850/900/1800/1900
Primary 3G networkNot supportedUMTS 850/900/2100
Primary 4G networkNot supportedLTE Cat4 (1, 3, 5, 7, 8, 20)
Primary 5G networkNot supportedNot supported
Primary data networkNot supportedGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE
Secondary 2G networkNot supportedNot supported
Secondary 3G networkNot supportedNot supported
Secondary 4G networkNot supportedNot supported
Secondary data networkNot supportedNot supported

📷 Camera

Xiaomi Amazfit T-RexSamsung Galaxy Watch Active 2 (40mm SM-R835U)
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

Xiaomi Amazfit T-RexSamsung Galaxy Watch Active 2 (40mm SM-R835U)
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

Xiaomi Amazfit T-RexSamsung Galaxy Watch Active 2 (40mm SM-R835U)
Loudspeakerfeature not registeredSupported
Active noise cancellationNot supportedNot supported
RadioNot supportedNot supported
TVNot supportedNot supported
Video formatsfeature not registeredMP4
Audio formatsfeature not registeredMP3, WAV, WMA, OGG, eAAC+

🔌 Connectivity

Xiaomi Amazfit T-RexSamsung Galaxy Watch Active 2 (40mm SM-R835U)
USBNot supportedNot supported
Audio outputNot supportedNot supported
TV outputNot supportedNot supported
Bluetooth5.0 + A2DP/LE5.0 + A2DP/LE
WiFiNot supported802.11 b/g/n (2.4Ghz)
DLNANot supportedNot supported
GPSA-GPS, GeoTagging, GLONASSA-GPS, GeoTagging, GLONASS, GALILEO, BeiDou
NFCNot supportedSupported
Infrared portNot supportedNot supported

🧭 Sensors

Xiaomi Amazfit T-RexSamsung Galaxy Watch Active 2 (40mm SM-R835U)
SensorsAccelerometer
Ambient Light sensor
Compass
Heart rate
Pedometer
SpO2
Accelerometer
Ambient Light sensor
Barometer
Heart rate
Pedometer
VO2 max
Vibrating alertSupportedSupported

🔋 Battery

Xiaomi Amazfit T-RexSamsung Galaxy Watch Active 2 (40mm SM-R835U)
Battery typeLiPo: Li-Ion polymer (Non removable)Li-Ion: Lithium-Ion (Non removable)
Battery capacity390 mAh247 mAh
Charger, watts Standard charging
Magnetic charging (dock)
Standard charging
Qi wireless charging
Talk time autonomy20 hours43 hours (1.8 days)
Standby480 hours (20 days)feature not registered

➕ Other features

Xiaomi Amazfit T-RexSamsung Galaxy Watch Active 2 (40mm SM-R835U)
Call controlNot supportedVoice dialing, Voice recorder, Voice commands
MessagingSMS (T9), E-mailSMS (T9), MMS, E-mail, Push mail
Hands-free callingNot supportedSupported
Video callingNot supportedNot supported
Ringtonesfeature not registeredPolyphonic and customized
Web browserNot supportedNot supported
Antennafeature not registeredInternal antenna
Qwerty physical keyboardNot supportedNot 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-RexSamsung Galaxy Watch Active 2 (40mm SM-R835U)
SAR 1.6W/kg (USA, Mexico, etc.)feature not registered0.43W/kg (head), 1.13W/kg (body)
SAR 2W/kg (Europe, UK, etc.)feature not registeredfeature not registered
X

We use cookies to provide and improve our services. By using our site, you consent to cookies. See more details: Privacy policy.