Samsung Galaxy Watch (42mm SM-R815U) vs Xiaomi Mi A2 (64GB)

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Side by side comparison between Samsung Galaxy Watch vs Xiaomi Mi A2 devices, differences, pros, cons and full specifications. What's the better?

11/6/2018 7:37 PM, updated: 11/14/2021 11:07 AM

Compare Xiaomi Mi A2 X Samsung Galaxy Watch (42mm SM-R815U) 10Points

Specifications Compare Models Pictures

1.2"
AMOLED

360x360

N/A

1.5GB
RAM

Dual-core

270
mAh

(Non removable)

24Points Xiaomi Mi A2 (64GB) Compare Samsung Galaxy Watch X

Specifications Compare Models Pictures

5.99"
IPS

1080x2160

12
MP

20mp

4GB
RAM

Octa-core

3000
mAh

(Non removable)

What's the better device? Xiaomi Mi A2 (64GB)

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!

10 Advantages Samsung Galaxy Watch (42mm SM-R815U)	vs	24 Advantages Xiaomi Mi A2 (64GB)
+49 grams (1.72 ounces)2 times Lighter	vs	166 grams (5.81 ounces)
+Stainless steel body, glass frontAdvantage More resistant material	vs	Aluminum body, glass front
+Super AMOLEDAdvantage Super AMOLED display is brighter and more vivid	vs	LTPS IPS LCD
+424 PPI5% Crisper display of text, images and videos because it has more pixels per inch (ppi)	vs	403 PPI
+BarometerAdvantage Sensors help you use the device	vs	Not supported
+Heart rateAdvantage Sensors help you use the device	vs	Not supported
+PedometerAdvantage Sensors help you use the device	vs	Not supported
+Qi wireless chargingAdvantage Wireless charging is another way to charge the battery.	vs	Not supported
+NFCAdvantage NFC allows you to make payments by approach quickly and securely	vs	Not supported
+5 ATM, MIL-STD-810G military certifiedAdvantage Protection against water allows you talk to your friends in the rain, for example	vs	Not supported
1.15GHz 64bit Dual-core	vs	+2.2GHz 64bit Octa-core (14nm)167% More powerful processor, you can open your applications faster
1.5GB LPDDR3	vs	+4GB LPDDR4X167% More RAM memory. Typically more responsive and better for multitasking.
4GB (1.5GB available)	vs	+64GB (51GB available)33 times More internal storage for applications and files
eMMC	vs	+eMMC 5.1Advantage Fastest write and read storage.
12.7 millimeters (0.5 inches)	vs	+7.3 millimeters (0.29 inches)74% Thinner
360x360 pixels	vs	+1080x2160 pixels17 times Higher resolution screen
1.2"	vs	+5.99"4 times Larger screen
Not supported	vs	+(dual camera) 12MP + 20MPAdvantage With a camera you can take pictures anywhere
Not supported	vs	+4K UHD (3840x2160)Advantage More image quality for recording videos with the primary camera
1500 apps	vs	+3500000 apps (Google Play Store)2332 times More apps available to download and use
(4G LTE) 10 Mbps	vs	+(4G LTE-A) 600 Mbps59 times Faster for surfing the internet and download files
Not supported	vs	+CompassAdvantage Sensors help you use the device
Not supported	vs	+Face unlockAdvantage Sensors help you use the device
Not supported	vs	+Fingerprint sensor (rear-mounted)Advantage Sensors help you use the device
Not supported	vs	+Proximity sensorAdvantage Sensors help you use the device
270 mAh	vs	+3000 mAh10 times Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
3.5W	vs	+18W4 times More power (watts) to charge the battery faster. Sometimes, the charger that comes with the device doesn't have the same power supported by the device. Check before you buy it.
1 slot (Single-SIM)	vs	+2 slots (Dual-SIM)Advantage You can have more mobile carriers/operators on the same device.
Not supported	vs	+Type-C jack with 3.5mm jack adapterAdvantage Best output for headset
802.11 b/g/n [wifi4]	vs	+802.11 a/b/g/n/ac [wifi5]Advantage WiFi 802.11 a/b/g/n/ac [wifi5] is newer and faster
4.2 + A2DP	vs	+5.0 + A2DP/LEAdvantage Bluetooth 5.0 + A2DP/LE is newer and faster
Not supported	vs	+USB 2.0 Type-C reversible connectorAdvantage Newer and faster USB version for transferring photos, mp3 or data.
Not supported	vs	+Type-CAdvantage Reversible connector, you can stick in a USB-C cable any which way; either side is up.
Not supported	vs	+HTML, XHTML, HTML5Advantage Better sites viewing on the internet

10 Common items in both devices

16 million

4G LTE / 4G LTE-A

Capacitive

Multitouch

Accelerometer

Ambient light sensor

Gyroscope

+3 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

📱 Model features
	Galaxy Watch (42mm SM-R815U)	Xiaomi Mi A2 (64GB)
Change model		Choose the model
Model	Galaxy Watch (42mm SM-R815U)	Xiaomi Mi A2 (64GB)
Other model names	Galaxy Watch 42mm (4G LTE) SM-R815UZDAXAR, Samsung Galileo	Xiaomi A2 M1804D2SG (64GB + 4GB RAM), 小米6X, Xiaomi Wayne
Country or region available	USA	(Global, International), India
Brand	Samsung	Xiaomi
Release date	8/1/2018	7/27/2018, Announced: 7/24/2018
Depth	12.7 millimeters (0.5 inches)	7.3 millimeters (0.29 inches)
Size (width x height)	41.9 x 45.7 millimeters (1.65 x 1.8 in)	75.4 x 158.7 millimeters (2.97 x 6.25 in)
Weight	49 grams (1.72 ounces)	166 grams (5.81 ounces)
Build, materials	Stainless steel body, glass front	Aluminum body, glass front
Protection against water and others	5 ATM: 50 meters waterproof. MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant.	Not supported
📲 Display
	Galaxy Watch (42mm SM-R815U)	Xiaomi Mi A2 (64GB)
Display type	Super AMOLED	LTPS IPS LCD
Screen size	1.2" inches	5.99" inches
Screen-to-body ratio	~24.3% (screen-to-body ratio)	~77.4% (screen-to-body ratio)
Display resolution	360x360 pixels (1:1)	1080x2160 pixels (19:9)
Touchscreen	Capacitive Multitouch	Capacitive Multitouch
Pixel density (dot pitch)	424 PPI	403 PPI
Colors	16 million	16 million
Scratch-resistant glass	Gorilla Glass DX+	Gorilla Glass 5
Refresh rate	feature not registered	60Hz
Display features	Not supported	Not supported
🤖 Operating System
	Galaxy Watch (42mm SM-R815U)	Xiaomi Mi A2 (64GB)
System version	Tizen 4.0	Android 8.1 Oreo
Firmware update	feature not registered	Android 10
User Interface	feature not registered	feature not registered
⚙️ Processor
	Galaxy Watch (42mm SM-R815U)	Xiaomi Mi A2 (64GB)
Chipset	64bit: Samsung Exynos 9 Dual 9110 (10nm)	64bit: Qualcomm Snapdragon 660 (SDM660) (14nm)
CPU	Dual-core, 1 processor: 2x 1.15GHz ARM Cortex-A53 (Dual-core)	Octa-core, 2 processors: 4x 2.2GHz Kryo 260 Gold (Quad-core) 4x 1.8GHz Kryo 260 Silver (Quad-core)
GPU graphical controller	ARM Mali-T720 MP1	Qualcomm Adreno 512 (650MHz)
Performance (benchmark)	feature not registered	AnTuTu: 130927 (v7), 172886 (v8) Geekbench: 4625 (v4.4), 1157 (v5.1) GFXBench: 8.6fps (ES 3.1 onscreen)
💽 Memory and storage
	Galaxy Watch (42mm SM-R815U)	Xiaomi Mi A2 (64GB)
RAM memory	1.5GB LPDDR3	4GB LPDDR4X
Internal storage	4GB (1.5GB available) eMMC	64GB (51GB available) eMMC 5.1
External storage	Not supported	Not supported
📶 Mobile networks
	Galaxy Watch (42mm SM-R815U)	Xiaomi Mi A2 (64GB)
Dual-SIM	Not supported	Dual-SIM Standby - Call active on one sim card
SIM card	1 slot (Single-SIM) e-SIM (Eletronic)	2 slots (Dual-SIM) nano-SIM (4FF)
Maximum Download / Upload	10 Mbps	600/150 Mbps
Network technology	3G, 4G	2G, 3G, 4G
Frequency, bands	Expand band details Collapse details
GSM MHz band	Not supported	Quad-Band 850/900/1800/1900
Primary 2G network	Not supported	GSM 850/900/1800/1900
Primary 3G network	UMTS 850/1700/1900	Global version: UMTS 850/900/1700/1900/2100 India version: UMTS 850/900/1900/2100
Primary 4G network	LTE (Bands 2,4,5,12,13,25,26,66)	LTE Cat12 VoLTE Global version: LTE (Bands 1, 2, 3, 4, 5, 7, 8, 20) TD-LTE (Bands 38, 40) India version: LTE (Bands 1, 3, 5) TD-LTE (Bands 40, 41)
Primary 5G network	Not supported	Not supported
Primary data network	UMTS, HSDPA, HSUPA, HSPA+, LTE	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A
Secondary 2G network	Not supported	GSM 850/900/1800/1900
Secondary 3G network	Not supported	Not supported
Secondary 4G network	Not supported	Not supported
Secondary data network	Not supported	GPRS, EDGE
📷 Camera
	Galaxy Watch (42mm SM-R815U)	Xiaomi Mi A2 (64GB)
Back camera (main camera)	Not supported	(dual camera) 12 megapixels 20MP f/1.81/2.8"1.0µm
Main camera resolution	Not supported	4000x3000 pixels
Video recording (primary)	Not supported	4K UHD (3840x2160) 30 fps
Flash	Not supported	Dual-LED on main camera and LED on front camera
Focal aperture	feature not registered	f/1.8 (aperture)
Focal length	feature not registered	feature not registered
Sensor size	feature not registered	1/2.9" inches
Pixel size	feature not registered	1.25µm pixel
Autofocus	Not supported	PDAF: phase detection autofocus
Touch focus	Not supported	Supported
Image stabilization	Not supported	EIS: Digital stabilization
Zoom	Not supported	Only digital zoom
Face/smile detection	Not supported	Face detection, Smile detection
BSI sensor	Not supported	Not supported
HDR	Not supported	HDR photo on both cameras
Camera extras	feature not registered	feature not registered
📸 Front camera
	Galaxy Watch (42mm SM-R815U)	Xiaomi Mi A2 (64GB)
Front camera (secondary)	Not supported	20 megapixels
Front camera resolution	Not supported	5164x3872 pixels
Video recording (secondary)	Not supported	Full HD (1920x1080)
Front flash	Not supported	LED
Focal aperture	feature not registered	f/2.2 (aperture)
Focal length	feature not registered	feature not registered
Sensor size	feature not registered	1/2.8" inches
Pixel size	feature not registered	1µm pixel
🔉 Sound and multimedia
	Galaxy Watch (42mm SM-R815U)	Xiaomi Mi A2 (64GB)
Loudspeaker	Supported	Supported
Active noise cancellation	Not supported	2 microphones or more
Radio	Not supported	Not supported
TV	Not supported	Not supported
Video formats	MP4	MP4, H.265, H.264, H.263, XviD, MKV
Audio formats	MP3, WAV, WMA, OGG, eAAC+	MP3, OGG, eAAC+, FLAC
🔌 Connectivity
	Galaxy Watch (42mm SM-R815U)	Xiaomi Mi A2 (64GB)
USB	Not supported	USB 2.0 Type-C reversible connector
Audio output	Not supported	Type-C jack with 3.5mm jack adapter
TV output	Not supported	Not supported
Bluetooth	4.2 + A2DP	5.0 + A2DP/LE
WiFi	802.11 b/g/n [wifi4] (2.4GHz)	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot
DLNA	Not supported	Not supported
GPS	A-GPS, GeoTagging, GLONASS	A-GPS, GeoTagging, GLONASS, BeiDou
NFC	Supported	Not supported
Infrared port	Not supported	Supported
🧭 Sensors
	Galaxy Watch (42mm SM-R815U)	Xiaomi Mi A2 (64GB)
Sensors	Accelerometer Ambient light sensor Barometer Gyroscope Heart rate Pedometer	Accelerometer Ambient light sensor Compass Face unlock Fingerprint sensor (rear-mounted) Gyroscope Hall effect Proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	Galaxy Watch (42mm SM-R815U)	Xiaomi Mi A2 (64GB)
Battery type	Li-Ion: lithium-ion (Non removable)	LiPo: li-ion polymer (Non removable)
Battery capacity	270 mAh	3000 mAh
Charger, watts	3.5W (5V/0.7A) Wired charging	18W Wired fast charging Quick Charge 4
Inductive / wireless charging	Qi wireless charging	Not supported
Talk time autonomy	feature not registered	feature not registered
Standby	72 hours (3 days)	feature not registered
➕ Other features
	Galaxy Watch (42mm SM-R815U)	Xiaomi Mi A2 (64GB)
Call control	Voice dialing, Voice recorder, Voice commands	Voice dialing, Voice recorder
Messaging	SMS (T9), MMS, E-mail, Push mail	SMS (T9), MMS, E-mail, Push mail
Hands-free calling	Supported	Supported
Video calling	Not supported	Supported
Ringtones	Polyphonic and customized	Polyphonic and customized
Web browser	Not supported	HTML, XHTML, HTML5
Antenna	Internal antenna	Internal antenna
Qwerty physical keyboard	Not supported	Not supported
Miscellaneous	• 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: Black, Gold, Blue, Red, Rose Gold • Android One • Back camera sensor: Sony IMX486/IMX376 • Front camera sensor: Sony IMX376 • WiFi display
☢️ Radiation rate
	Galaxy Watch (42mm SM-R815U)	Xiaomi Mi A2 (64GB)
SAR 1.6W/kg (USA, Mexico, etc.)	0.961W/kg (head), 1.786W/kg (body)	0.96W/kg (head), 0.64W/kg (body)
SAR 2W/kg (Europe, UK, etc.)	feature not registered	1.16W/kg (head), 0.66W/kg (body)