Physical features | Samsung Galaxy Watch Active 2 (40mm SM-R835F) | Xiaomi Amazfit Stratos 2S |
Model | Galaxy Watch Active 2 (40mm SM-R835F) | Amazfit Stratos 2S |
Other model names | Galaxy Watch Active2 4G LTE SM-R835U (Stainless Steel) | Xiaomi Huami Amazfit 2 Stratos A1619, Amazfit Pace 2 |
Country or region available |  (Global, International) |  (Europe) |
Brand | Samsung | Xiaomi |
Release date | September, 2019 | December, 2017 |
Depth | 10.9 millimeters (0.43 inches) | 15 millimeters (0.59 inches) |
Size (width x height) | 40 x 40 millimeters (1.57 x 1.57 in) | 25.4 x 51 millimeters (1 x 2.01 in) |
Weight | 37 grams (1.3 ounces) | 68 grams (2.38 ounces) |
Qwerty physical keyboard | Not supported | Not supported |
Antenna | Internal antenna | Internal antenna |
Build, materials | Stainless steel body, glass front | Plastic body with ceramic and stainless steel, 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. | 50 meters waterproof |
System (OS) | Samsung Galaxy Watch Active 2 (40mm SM-R835F) | Xiaomi Amazfit Stratos 2S |
Operating system | Tizen 4.0 | Proprietary OS |
Firmware update | feature not registered | feature not registered |
Hardware | Samsung Galaxy Watch Active 2 (40mm SM-R835F) | Xiaomi Amazfit Stratos 2S |
Chipset | 64bit - Samsung Exynos 9 Dual 9110 (10nm) | 32bit - Ingenic M200S |
CPU processor | 1.15Ghz Dual-Core ARM Cortex-A53 | Dual-Core, 2 processors: 1.2Ghz Single-Core XBurst-HP 300Mhz Single-Core XBurst-LP |
GPU graphical controller | ARM Mali-T720 MP1 | 3D GPU |
RAM memory | 1.5GB LPDDR3 | 512MB LPDDR2 |
Internal storage | 4GB (1.39GB available) eMMC | 4GB (2GB available) eMCP |
External storage | Not supported | Not supported |
Display | Samsung Galaxy Watch Active 2 (40mm SM-R835F) | Xiaomi Amazfit Stratos 2S |
Display type | Super AMOLED | TFT LCD |
Screen size | 1.2" inches | 1.34" inches |
Screen-to-body ratio | ~29% (screen-to-body ratio) | ~44.6% (screen-to-body ratio) |
Display resolution | 360x360 pixels (1:1) | 320x300 pixels |
Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
Pixel density (dot pitch) | 424 PPI | 327 PPI |
Colors | 16 million | 260 thousand |
Scratch-resistant glass | Gorilla Glass DX+ | Sapphire Glass |
Display features | Not supported | feature not registered |
Mobile networks | Samsung Galaxy Watch Active 2 (40mm SM-R835F) | Xiaomi Amazfit Stratos 2S |
Dual-SIM | Not supported | Not supported |
SIM card | 1 slot (Single-SIM) e-SIM (Eletronic) | Not supported |
Maximum download/upload | 150/50 Mbps | feature not registered |
Network technology | 2G, 3G, 4G | feature not registered |
Frequency, bands | Expand band detailsCollapse details |
GSM Mhz band | Quad-Band 850/900/1800/1900 | Not supported |
Primary 2G network | GSM 850/900/1800/1900 | Not supported |
Primary 3G network | UMTS 850/900/2100 | Not supported |
Primary 4G network | LTE Cat4 (1, 3, 5, 7, 8, 20) | Not supported |
Primary 5G network | Not supported | Not supported |
Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE | Not supported |
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 Active 2 (40mm SM-R835F) | Xiaomi Amazfit Stratos 2S |
Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (T9), E-mail |
Speakerphone | Supported | Supported |
Video calling | Not supported | Not supported |
Call control | Voice dialing, Voice recorder, Voice commands | Not supported |
Camera | Samsung Galaxy Watch Active 2 (40mm SM-R835F) | Xiaomi Amazfit Stratos 2S |
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 Active 2 (40mm SM-R835F) | Xiaomi Amazfit Stratos 2S |
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 Active 2 (40mm SM-R835F) | Xiaomi Amazfit Stratos 2S |
Radio | Not supported | Not supported |
TV | Not supported | Not supported |
Video formats | MP4 | feature not registered |
Audio formats | MP3, WAV, WMA, OGG, eAAC+ | MP3, eAAC+ |
Connectivity | Samsung Galaxy Watch Active 2 (40mm SM-R835F) | Xiaomi Amazfit Stratos 2S |
USB | Not supported | MicroUSB 2.0 |
TV output | Not supported | Not supported |
Audio output | Not supported | Not supported |
Bluetooth | 5.0 + A2DP/LE | 4.0 + A2DP |
WiFi | 802.11 b/g/n (2.4Ghz) | 802.11 b/g (2.4Ghz) |
DLNA | Not supported | Not supported |
NFC | Supported | Not supported |
GPS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou | A-GPS, GeoTagging, GLONASS |
Infrared port | Not supported | Not supported |
Other functions | Samsung Galaxy Watch Active 2 (40mm SM-R835F) | Xiaomi Amazfit Stratos 2S |
Active noise cancellation | Not supported | Not supported |
Vibrating alert | Supported | Supported |
Ringtones | Polyphonic and customized | feature not registered |
Web browser | Not supported | Not supported |
Sensors | Accelerometer Ambient Light sensor Barometer Heart rate Pedometer
| Accelerometer Compass Ambient Light sensor Gyroscope Barometer Heart rate Pedometer
|
Other features | - Colors: Black, Silver, Pink Gold - Bands: 20mm - Always-on display - Samsung Pay | - Colors: Black - Leather watch band - 22mm standard watch band - 2.5D glass display - Dock charger included - Always-on display - Languages: Chinese, English, Spanish - Mi Fit app compatible - Compatible with Android 4.4, iOS 9 and above |
Power supply | Samsung Galaxy Watch Active 2 (40mm SM-R835F) | Xiaomi Amazfit Stratos 2S |
Battery | Li-Ion: Lithium-Ion (Non removable) | LiPo: Li-Ion polymer (Non removable) |
Battery capacity | 247 mAh | 290 mAh |
Charger, watts | Standard charging Qi wireless charging | Standard charging |
Talk time autonomy | 2580 minutes | 43 hours | 1.8 days | 1800 minutes | 30 hours | 1.3 days |
Standby | feature not registered | 7200 minutes | 120 hours | 5 days |
Radiation rate | Samsung Galaxy Watch Active 2 (40mm SM-R835F) | Xiaomi Amazfit Stratos 2S |
SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | feature not registered |
SAR 2W/kg (Europe, UK, etc.) | 0.255W/kg (head) | 1.528W/kg (body) | feature not registered |