Physical features | Samsung Galaxy Watch (42mm SM-R815U) | Huawei Watch 2 (2018) |
Model | Galaxy Watch (42mm SM-R815U) | Watch 2 (2018) |
Other model names | Galaxy Watch 42mm (4G LTE) SM-R815UZDAXAR, Samsung Galileo | Huawei Watch2 2018 e-sim, Huawei Leo |
Country or region available |  USA |  China |
Brand | Samsung | Huawei |
Release date | August, 2018 | May, 2018 |
Depth | 12.7 millimeters (0.5 inches) | 12.6 millimeters (0.5 inches) |
Size (width x height) | 41.9 x 45.7 millimeters (1.65 x 1.8 in) | 45 x 48.9 millimeters (1.77 x 1.93 in) |
Weight | 49 grams (1.72 ounces) | 57 grams (2 ounces) |
Qwerty physical keyboard | Not supported | Not supported |
Antenna | Internal antenna | Internal antenna |
Build, materials | Stainless steel body, glass front | Plastic body, glass front |
Protection against water and others | 50 meters waterproof. MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. | IP68 certified: dust proof and waterproof over 1.5 meter and 30min |
System (OS) | Samsung Galaxy Watch (42mm SM-R815U) | Huawei Watch 2 (2018) |
Operating system | Tizen 4.0 | Android Wear 2.0 (7.1.1 Nougat) |
Firmware update | feature not registered | Android Wear 2.1 (8.0 Oreo) |
Hardware | Samsung Galaxy Watch (42mm SM-R815U) | Huawei Watch 2 (2018) |
Chipset | 64bit - Samsung Exynos 9 Dual 9110 (10nm) | 32bit - Qualcomm Snapdragon Wear 2100 MSM8909w (28nm) |
CPU processor | 1.15Ghz Dual-Core ARM Cortex-A53 | 1.1Ghz Quad-Core ARM Cortex-A7 |
GPU graphical controller | ARM Mali-T720 MP1 | Qualcomm Adreno 304 |
RAM memory | 1.5GB LPDDR3 | 768MB LPDDR3 |
Internal storage | 4GB (1.5GB available) eMMC | 4GB (2GB available) |
External storage | Not supported | Not supported |
Display | Samsung Galaxy Watch (42mm SM-R815U) | Huawei Watch 2 (2018) |
Display type | Super AMOLED | AMOLED |
Screen size | 1.2" inches | 1.2" inches |
Screen-to-body ratio | ~24.3% (screen-to-body ratio) | ~21.1% (screen-to-body ratio) |
Display resolution | 360x360 pixels (1:1) | 390x390 pixels |
Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
Pixel density (dot pitch) | 424 PPI | 460 PPI |
Colors | 16 million | 16 million |
Scratch-resistant glass | Gorilla Glass DX+ | Gorilla Glass |
Display features | Not supported | feature not registered |
Mobile networks | Samsung Galaxy Watch (42mm SM-R815U) | Huawei Watch 2 (2018) |
Dual-SIM | Not supported | Not supported |
SIM card | 1 slot (Single-SIM) e-SIM (Eletronic) | 1 slot (Single-SIM) nano-SIM (4FF) |
Maximum download/upload | 10 Mbps | 150/50 Mbps |
Network technology | 3G, 4G | 2G, 3G, 4G |
Frequency, bands | Expand band detailsCollapse details |
GSM Mhz band | Not supported | Dual-Band 900/1800 |
Primary 2G network | Not supported | GSM 900/1800 |
Primary 3G network | UMTS 850/1700/1900 | TD-SCDMA 1900/2000 UMTS 900/1900/2100 |
Primary 4G network | LTE (Bands 2,4,5,12,13,25,26,66) | LTE Cat4 (Bands 1,3,7,8) TD-LTE (Bands 39,41) |
Primary 5G network | Not supported | Not supported |
Primary data network | UMTS, HSDPA, HSUPA, HSPA+, LTE | GPRS, EDGE, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE |
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 |
Calling | Samsung Galaxy Watch (42mm SM-R815U) | Huawei Watch 2 (2018) |
Messaging | SMS (T9), MMS, E-mail, Push mail | SMS, E-mail |
Speakerphone | Supported | Supported |
Video calling | Not supported | Not supported |
Call control | Voice dialing, Voice recorder, Voice commands | Voice dialing, Voice recorder, Voice commands |
Camera | Samsung Galaxy Watch (42mm SM-R815U) | Huawei Watch 2 (2018) |
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 | Not supported | 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 |
2ª camera | Samsung Galaxy Watch (42mm SM-R815U) | Huawei Watch 2 (2018) |
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 |
Multimedia | Samsung Galaxy Watch (42mm SM-R815U) | Huawei Watch 2 (2018) |
Radio | Not supported | Not supported |
TV | Not supported | Not supported |
Video formats | MP4 | feature not registered |
Audio formats | MP3, WAV, WMA, OGG, eAAC+ | MP3, WAV, eAAC+, FLAC |
Connectivity | Samsung Galaxy Watch (42mm SM-R815U) | Huawei Watch 2 (2018) |
USB | Not supported | Not supported |
TV output | Not supported | Not supported |
Audio output | Not supported | Not supported |
Bluetooth | 4.2 + A2DP | 4.1 + A2DP |
WiFi | 802.11 b/g/n (2.4Ghz) | 802.11 b/g/n (2.4Ghz) |
DLNA | Not supported | Not supported |
NFC | Supported | Supported |
GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging, GLONASS |
Infrared port | Not supported | Not supported |
Other functions | Samsung Galaxy Watch (42mm SM-R815U) | Huawei Watch 2 (2018) |
Active noise cancellation | Not supported | Not supported |
Vibrating alert | Supported | Supported |
Ringtones | Polyphonic and customized | Polyphonic and customized |
Web browser | Not supported | Not supported |
Sensors | Accelerometer Ambient Light sensor Gyroscope Barometer Heart rate Pedometer
| Accelerometer Compass 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: Carbon Black - Google Assistant - Workout data report - Compatible with standard 20mm straps |
Power supply | Samsung Galaxy Watch (42mm SM-R815U) | Huawei Watch 2 (2018) |
Battery | Li-Ion: Lithium-Ion (Non removable) | Li-Ion: Lithium-Ion (Non removable) |
Battery capacity | 270 mAh | 420 mAh |
Charger, watts | 3.5W (5V/0.7A) Standard charging Qi wireless charging | Standard charging Magnetic charging (dock) |
Talk time autonomy | feature not registered | feature not registered |
Standby | 4320 minutes | 72 hours | 3 days | feature not registered |
Radiation rate | Samsung Galaxy Watch (42mm SM-R815U) | Huawei Watch 2 (2018) |
SAR 1.6W/kg (USA, Mexico, etc.) | 0.961W/kg (head) | 1.786W/kg (body) | feature not registered |
SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |