Samsung Galaxy Express 2 (SM-G3815) vs Samsung Galaxy Watch (42mm SM-R815U)
Side by side comparison between Samsung Galaxy Express 2 vs Samsung Galaxy Watch devices, differences, pros, cons and full specifications. What's the better?
,
4.5"
TFT
TFT
540x960
5
MP
MP
0.3mp
1.5GB
RAM
RAM
Dual-core
2100
mAh
mAh
(Removable)
vs
1.2"
AMOLED
AMOLED
360x360
N/A
1.5GB
RAM
RAM
Dual-core
270
mAh
mAh
(Non removable)
What's the better device? Samsung Galaxy Express 2 (SM-G3815)
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!
19 Advantages 
10 Advantages | 10 Common items in both devices |
| 16 million |
| 4G LTE |
| 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 Clear highlight📱 Model features | ||
| Galaxy Express 2 (SM-G3815) | Galaxy Watch (42mm SM-R815U) | |
| Change model | ||
| Model | Galaxy Express 2 (SM-G3815) | Galaxy Watch (42mm SM-R815U) |
| Other model names | Samsung Galaxy Express II G3815 | Galaxy Watch 42mm (4G LTE) SM-R815UZDAXAR, Samsung Galileo |
| Country or region available |  (Global, International) |  USA |
| Brand | Samsung | Samsung |
| Release date | 10/1/2013 | 8/1/2018 |
| Depth | 9.8 millimeters (0.39 inches) | 12.7 millimeters (0.5 inches) |
| Size (width x height) | 65.7 x 132.4 millimeters (2.59 x 5.21 in) | 41.9 x 45.7 millimeters (1.65 x 1.8 in) |
| Weight | 134 grams (4.69 ounces) | 49 grams (1.72 ounces) |
| Build, materials | feature not registered | Stainless steel body, glass front |
| Protection against water and others | Not supported | 5 ATM: 50 meters waterproof. MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. |
📲 Display | ||
| Galaxy Express 2 (SM-G3815) | Galaxy Watch (42mm SM-R815U) | |
| Display type | TFT LCD | Super AMOLED |
| Screen size | 4.5" inches | 1.2" inches |
| Screen-to-body ratio | ~64.2% (screen-to-body ratio) | ~24.3% (screen-to-body ratio) |
| Display resolution | 540x960 pixels | 360x360 pixels (1:1) |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 245 PPI | 424 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Not supported | Gorilla Glass DX+ |
| Refresh rate | feature not registered | feature not registered |
| Display features | feature not registered | Not supported |
🤖 Operating System | ||
| Galaxy Express 2 (SM-G3815) | Galaxy Watch (42mm SM-R815U) | |
| System version | Android 4.2.2 Jelly Bean | Tizen 4.0 |
| Firmware update | feature not registered | feature not registered |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| Galaxy Express 2 (SM-G3815) | Galaxy Watch (42mm SM-R815U) | |
| Chipset | 32bit: Qualcomm Snapdragon 400 MSM8930AB | 64bit: Samsung Exynos 9 Dual 9110 (10nm) |
| CPU | Dual-core, 1 processor: 2x 1.7GHz Krait 300 (Dual-core) | Dual-core, 1 processor: 2x 1.15GHz ARM Cortex-A53 (Dual-core) |
| GPU graphical controller | Qualcomm Adreno 305 | ARM Mali-T720 MP1 |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Galaxy Express 2 (SM-G3815) | Galaxy Watch (42mm SM-R815U) | |
| RAM memory | 1.5GB LPDDR2 | 1.5GB LPDDR3 |
| Internal storage | 8GB | 4GB (1.5GB available) eMMC |
| External storage | Until 64GB microSD, microSDXC (dedicated slot) | Not supported |
📶 Mobile networks | ||
| Galaxy Express 2 (SM-G3815) | Galaxy Watch (42mm SM-R815U) | |
| Dual-SIM | Not supported | Not supported |
| SIM card | 1 slot (Single-SIM) micro-SIM (3FF) | 1 slot (Single-SIM) e-SIM (Eletronic) |
| Maximum Download / Upload | 100/50 Mbps | 10 Mbps |
| Network technology | 2G, 3G, 4G | 3G, 4G |
| Frequency, bands | Expand band details Collapse 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 | UMTS 850/1700/1900 |
| Primary 4G network | LTE 800/900/1800/2600 | LTE (Bands 2,4,5,12,13,25,26,66) |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE | UMTS, HSDPA, HSUPA, HSPA+, 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 |
📷 Camera | ||
| Galaxy Express 2 (SM-G3815) | Galaxy Watch (42mm SM-R815U) | |
| Back camera (main camera) | 5 megapixels | Not supported |
| Main camera resolution | 2592x1944 pixels | Not supported |
| Video recording (primary) | HD (1280x720) 30 fps | Not supported |
| Flash | LED flash | Not supported |
| Focal aperture | f/2.6 (aperture) | 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 | Autofocus | Not supported |
| Touch focus | Supported | Not supported |
| Image stabilization | feature not registered | Not supported |
| Zoom | Only digital zoom | Not supported |
| Face/smile detection | Face detection, Smile detection | Not supported |
| BSI sensor | Not supported | Not supported |
| HDR | Not supported | Not supported |
| Camera extras | feature not registered | feature not registered |
📸 Front camera | ||
| Galaxy Express 2 (SM-G3815) | Galaxy Watch (42mm SM-R815U) | |
| Front camera (secondary) | 0.3 megapixels | Not supported |
| Front camera resolution | 640x480 pixels | Not supported |
| Video recording (secondary) | VGA (640x480) | 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 |
🔉 Sound and multimedia | ||
| Galaxy Express 2 (SM-G3815) | Galaxy Watch (42mm SM-R815U) | |
| Loudspeaker | Supported | Supported |
| Active noise cancellation | Not supported | Not supported |
| Radio | FM (RDS) | Not supported |
| TV | Not supported | Not supported |
| Video formats | MP4, H.264, H.263, WMV | MP4 |
| Audio formats | MP3, WAV, eAAC+, FLAC | MP3, WAV, WMA, OGG, eAAC+ |
🔌 Connectivity | ||
| Galaxy Express 2 (SM-G3815) | Galaxy Watch (42mm SM-R815U) | |
| USB | MicroUSB 2.0, USB OTG On-The-Go | Not supported |
| Audio output | 3.5mm jack | Not supported |
| TV output | Micro-B USB MHL | Not supported |
| Bluetooth | 4.0 + A2DP | 4.2 + A2DP |
| WiFi | 802.11 b/g/n [wifi4] (2.4GHz) WiFi Direct, hotspot | 802.11 b/g/n [wifi4] (2.4GHz) |
| DLNA | Supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging, GLONASS |
| NFC | Supported | Supported |
| Infrared port | feature not registered | Not supported |
🧭 Sensors | ||
| Galaxy Express 2 (SM-G3815) | Galaxy Watch (42mm SM-R815U) | |
| Sensors | Accelerometer Ambient light sensor Compass Gyroscope Proximity sensor | Accelerometer Ambient light sensor Barometer Gyroscope Heart rate Pedometer |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Galaxy Express 2 (SM-G3815) | Galaxy Watch (42mm SM-R815U) | |
| Battery type | Li-Ion: lithium-ion (Removable) | Li-Ion: lithium-ion (Non removable) |
| Battery capacity | 2100 mAh | 270 mAh |
| Charger, watts | Wired charging | 3.5W (5V/0.7A) Wired charging |
| Inductive / wireless charging | feature not registered | Qi wireless charging |
| Talk time autonomy | 11 hours | feature not registered |
| Standby | 480 hours (20 days) | 72 hours (3 days) |
➕ Other features | ||
| Galaxy Express 2 (SM-G3815) | Galaxy Watch (42mm SM-R815U) | |
| Call control | Voice dialing, Voice recorder, Voice commands | Voice dialing, Voice recorder, Voice commands |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (T9), MMS, E-mail, Push mail |
| Hands-free calling | Supported | Supported |
| Video calling | Supported | Not supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 | Not supported |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: Blue, White • Samsung TouchWiz UI • Java framework | • 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 |
☢️ Radiation rate | ||
| Galaxy Express 2 (SM-G3815) | Galaxy Watch (42mm SM-R815U) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | 0.38W/kg (head), 0.7W/kg (body) | 0.961W/kg (head), 1.786W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | 0.38W/kg (head), 0.36W/kg (body) | feature not registered |