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Samsung Galaxy Watch (42mm SM-R815U) vs Samsung Gear S3 classic (4G SM-R775A)

Side by side comparison between Samsung Galaxy Watch vs Samsung Gear S3 classic smartwatches, differences, pros, cons with full specifications. What's the better?

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Compare Samsung Gear S3 classic XSamsung Galaxy Watch (42mm SM-R815U)06Points
Samsung Galaxy Watch (42mm SM-R815U)
1.2"
AMOLED

360x360

N/A
MP

1.5GB
RAM

64bit Dual

270
mAh

(Non removable)

vs
05PointsSamsung Gear S3 classic (4G SM-R775A)Compare Samsung Galaxy Watch X
Samsung Gear S3 classic (4G SM-R775A)
1.3"
AMOLED

360x360

N/A
MP

768MB
RAM

64bit Dual

380
mAh

(Non removable)

What's the better smartwatch? Samsung Galaxy Watch (42mm SM-R815U)

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!

Galaxy Watch (42mm SM-R815U)6 Advantages Samsung Galaxy Watch (42mm SM-R815U)vsGear S3 classic (4G SM-R775A)5 Advantages Samsung Gear S3 classic (4G SM-R775A)
+1.15Ghz 64bit Dual-Core20%
More powerful processor, you can open your applications faster
vs1Ghz 64bit Dual-Core
+1.5GB LPDDR3100%
More RAM memory. Typically more responsive and better for multitasking.
vs768MB LPDDR3
+49 grams (1.72 ounces)16%
Lighter
vs57 grams (2 ounces)
+12.7 millimeters (0.5 inches)2%
Thinner
vs12.9 millimeters (0.51 inches)
+424 PPI8%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
vs392 PPI
+Tizen 4.0Advantage
Tizen 4.0 is newer and safer
vsTizen 3.0
4GB (1.5GB available)vs+4GB (2GB available)33%
More internal storage for applications and files
1.2"vs+1.3"8%
Larger screen
(4G LTE) 10 Mbpsvs+(4G LTE) 150 Mbps14 times
Faster for surfing the internet and download files
270 mAhvs+380 mAh41%
Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
Not supportedvs+Active noise cancellationAdvantage
Noise-canceling microphone allows better call quality

24 Common items in both devices
Stainless steel body, glass front
Super AMOLED
16 million
360x360 pixels
4G LTE
Capacitive
Multitouch
+17 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
Physical featuresSamsung Galaxy Watch (42mm SM-R815U)Samsung Gear S3 classic (4G SM-R775A)
ModelGalaxy Watch (42mm SM-R815U)Gear S3 classic (4G SM-R775A)
Other model namesGalaxy Watch 42mm (4G LTE) SM-R815UZDAXAR, Samsung GalileoAT&T Samsung Gear S3 R775A, Gear S3 classic LTE
Country or region availableUSA
USA
USA
USA
BrandSamsungSamsung
Release dateAugust, 2018March, 2017
Depth12.7 millimeters (0.5 inches)12.9 millimeters (0.51 inches)
Size (width x height)41.9 x 45.7 millimeters (1.65 x 1.8 in)46 x 49 millimeters (1.81 x 1.93 in)
Weight49 grams (1.72 ounces)57 grams (2 ounces)
Qwerty physical keyboardNot supportedNot supported
AntennaInternal antennaInternal antenna
Build, materialsStainless steel body, glass frontStainless steel body, glass front
Protection against water and others50 meters waterproof.
MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant.
IP68 certified: dust/water proof over 1.5 meter and 30min.
MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant.
System (OS)Samsung Galaxy Watch (42mm SM-R815U)Samsung Gear S3 classic (4G SM-R775A)
Operating systemTizen 4.0Tizen 2.3.2
Firmware updatefeature not registeredTizen 3.0
HardwareSamsung Galaxy Watch (42mm SM-R815U)Samsung Gear S3 classic (4G SM-R775A)
Chipset64bit - Samsung Exynos 9 Dual 9110 (10nm)64bit - Samsung Exynos 7 Dual 7270 (14nm)
CPU processor1.15Ghz Dual-Core ARM Cortex-A531Ghz Dual-Core ARM Cortex-A53
GPU graphical controllerARM Mali-T720 MP1ARM Mali-T720
RAM memory1.5GB LPDDR3768MB LPDDR3
Internal storage4GB (1.5GB available)
eMMC
4GB (2GB available)
External storageNot supportedNot supported
DisplaySamsung Galaxy Watch (42mm SM-R815U)Samsung Gear S3 classic (4G SM-R775A)
Display typeSuper AMOLEDSuper AMOLED
Screen size1.2" inches1.3" inches
Screen-to-body ratio~24.3% (screen-to-body ratio)~24.2% (screen-to-body ratio)
Display resolution360x360 pixels (1:1)360x360 pixels
TouchscreenCapacitive MultitouchCapacitive Multitouch
Pixel density (dot pitch)424 PPI392 PPI
Colors16 million16 million
Scratch-resistant glassGorilla Glass DX+Gorilla Glass SR+
Display featuresNot supportedfeature not registered
Mobile networksSamsung Galaxy Watch (42mm SM-R815U)Samsung Gear S3 classic (4G SM-R775A)
Dual-SIMNot supportedNot supported
SIM card1 slot (Single-SIM)
e-SIM (Eletronic)
1 slot (Single-SIM)
e-SIM (Eletronic)
Maximum download/upload10 Mbps150/50 Mbps
Network technology3G, 4G3G, 4G
Frequency, bandsExpand band detailsCollapse details
GSM Mhz bandNot supportedNot supported
Primary 2G networkNot supportedNot supported
Primary 3G networkUMTS 850/1700/1900UMTS 850/1700/1900
Primary 4G networkLTE (Bands 2,4,5,12,13,25,26,66)LTE Cat4 850/1700/1900 (Bands 2,4,5)
Primary 5G networkNot supportedNot supported
Primary data networkUMTS, HSDPA, HSUPA, HSPA+, LTEUMTS, HSDPA, HSUPA, HSPA+, LTE
Secondary 2G networkNot supportedNot supported
Secondary 3G networkNot supportedNot supported
Secondary 4G networkNot supportedNot supported
Secondary data networkNot supportedNot supported
CallingSamsung Galaxy Watch (42mm SM-R815U)Samsung Gear S3 classic (4G SM-R775A)
MessagingSMS (T9), MMS, E-mail, Push mailSMS, MMS, E-mail, Push mail
SpeakerphoneSupportedSupported
Video callingNot supportedNot supported
Call controlVoice dialing, Voice recorder, Voice commandsVoice dialing, Voice recorder, Voice commands
CameraSamsung Galaxy Watch (42mm SM-R815U)Samsung Gear S3 classic (4G SM-R775A)
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
2ª cameraSamsung Galaxy Watch (42mm SM-R815U)Samsung Gear S3 classic (4G SM-R775A)
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
MultimediaSamsung Galaxy Watch (42mm SM-R815U)Samsung Gear S3 classic (4G SM-R775A)
RadioNot supportedNot supported
TVNot supportedNot supported
Video formatsMP4feature not registered
Audio formatsMP3, WAV, WMA, OGG, eAAC+MP3, WAV, WMA, OGG, eAAC+
ConnectivitySamsung Galaxy Watch (42mm SM-R815U)Samsung Gear S3 classic (4G SM-R775A)
USBNot supportedNot supported
TV outputNot supportedNot supported
Audio outputNot supportedNot supported
Bluetooth4.2 + A2DP4.2 + A2DP
WiFi802.11 b/g/n (2.4Ghz)802.11 b/g/n (2.4Ghz)
DLNANot supportedNot supported
NFCSupportedSupported
GPSA-GPS, GeoTagging, GLONASSA-GPS, GeoTagging, GLONASS
Infrared portNot supportedNot supported
Other functionsSamsung Galaxy Watch (42mm SM-R815U)Samsung Gear S3 classic (4G SM-R775A)
Active noise cancellationNot supportedSupported
Vibrating alertSupportedSupported
RingtonesPolyphonic and customizedPolyphonic and customized
Web browserNot supportedNot supported
SensorsAccelerometer
Ambient Light sensor
Gyroscope
Barometer
Heart rate
Pedometer
Accelerometer
Ambient Light sensor
Gyroscope
Barometer
Heart rate
Pedometer
Other features- Colors: Midnight Black, Rose Gold
- Straps: Black, Grey, Red, Yellow, Purple, Pink, Brown
- Compatible with standard 20mm straps
- Always-on display
- Rotating bezel
- Samsung Pay
- Compatible with Sprint, T-Mobile and Verizon carriers
- Colors: Silver
- Leather band strap (22mm)
- Stainless Steel body 316L
- Samsung Pay
- S-Voice, S-Health
Power supplySamsung Galaxy Watch (42mm SM-R815U)Samsung Gear S3 classic (4G SM-R775A)
BatteryLi-Ion: Lithium-Ion (Non removable)Li-Ion: Lithium-Ion (Non removable)
Battery capacity270 mAh380 mAh
Charger, watts3.5W (5V/0.7A) Standard charging
Qi wireless charging
Standard charging
WPC/Qi Wireless charging
Talk time autonomyfeature not registeredfeature not registered
Standby4320 minutes | 72 hours | 3 days4320 minutes | 72 hours | 3 days
Radiation rateSamsung Galaxy Watch (42mm SM-R815U)Samsung Gear S3 classic (4G SM-R775A)
SAR 1.6W/kg (USA, Mexico, etc.)0.961W/kg (head) | 1.786W/kg (body)1.073W/kg (head) | 1.381W/kg (body)
SAR 2W/kg (Europe, UK, etc.)feature not registeredfeature not registered
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