Samsung Galaxy J7 Duo (SM-J720M/DS) vs Samsung Galaxy S3 Slim Duos (SM-G3812B)
Side by side comparison between Samsung Galaxy J7 Duo vs Samsung Galaxy S3 Slim phones, differences, pros, cons and full specifications. What's the better?
,
5.5"
AMOLED
AMOLED
720x1280
13
MP
MP
8mp
3GB
RAM
RAM
Octa-core
3000
mAh
mAh
(Removable)
vs
4.5"
TFT
TFT
540x960
5
MP
MP
0.3mp
1GB
RAM
RAM
Quad-core
2100
mAh
mAh
(Removable)
What's the better phone? Samsung Galaxy J7 Duo (SM-J720M/DS)
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!
23 Advantages 
4 Advantages | 23 Common items in both devices |
| Plastic body, glass front |
| 60Hz |
| 16 million |
| Only digital zoom |
| Autofocus |
| EIS: Digital stabilization |
| HDR photo only main camera |
| +16 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 J7 Duo (SM-J720M/DS) | Galaxy S3 Slim Duos (SM-G3812B) | |
| Model | Galaxy J7 Duo (SM-J720M/DS) | Galaxy S3 Slim Duos (SM-G3812B) |
| Other model names | Galaxy J7 Duo J720M/Dual-Sim, Samsung J720 | Galaxy S3 Slim G3812B, Samsung Galaxy Win Pro |
| Country or region available |   (Latin America), Brazil | Brazil |
| Brand | Samsung | Samsung |
| Release date | 4/1/2018 | 3/1/2014 |
| Depth | 8.2 millimeters (0.32 inches) | 9.7 millimeters (0.38 inches) |
| Size (width x height) | 77.2 x 153.5 millimeters (3.04 x 6.04 in) | 66 x 133 millimeters (2.6 x 5.24 in) |
| Weight | 174 grams (6.09 ounces) | 139 grams (4.87 ounces) |
| Build, materials | Plastic body, glass front | Plastic body, glass front |
| Protection against water and others | Not supported | Not supported |
📲 Display | ||
| Galaxy J7 Duo (SM-J720M/DS) | Galaxy S3 Slim Duos (SM-G3812B) | |
| Display type | Super AMOLED | TFT LCD |
| Screen size | 5.5" inches | 4.5" inches |
| Screen-to-body ratio | ~70.4% (screen-to-body ratio) | ~63.6% (screen-to-body ratio) |
| Display resolution | 720x1280 pixels (16:9) | 540x960 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 267 PPI | 245 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Not supported | Not supported |
| Refresh rate | 60Hz | 60Hz |
| Display features | Not supported | Not supported |
🤖 Operating System | ||
| Galaxy J7 Duo (SM-J720M/DS) | Galaxy S3 Slim Duos (SM-G3812B) | |
| System version | Android 8.0 Oreo | Android 4.2.2 Jelly Bean |
| Firmware update | Android 10 | feature not registered |
| User Interface | One UI 2.0 | TouchWiz UX |
⚙️ Processor | ||
| Galaxy J7 Duo (SM-J720M/DS) | Galaxy S3 Slim Duos (SM-G3812B) | |
| Chipset | 64bit: Samsung Exynos 7885 (14nm) | 32bit: Qualcomm Snapdragon 200 (MSM8225Q) (45nm) |
| CPU | Octa-core, 2 processors: 2x 2.2GHz ARM Cortex-A73 (Dual-core) 6x 1.6GHz ARM Cortex-A53 (Hexa-core) | Quad-core, 1 processor: 4x 1.2GHz ARM Cortex-A5 (Quad-core) |
| GPU graphical controller | ARM Mali-G71 MP2 | Qualcomm Adreno 203 (400MHz) |
| Performance (benchmark) | AnTuTu: 98104 (v7) | feature not registered |
💽 Memory and storage | ||
| Galaxy J7 Duo (SM-J720M/DS) | Galaxy S3 Slim Duos (SM-G3812B) | |
| RAM memory | 3GB LPDDR4 | 1GB LPDDR2 |
| Internal storage | 32GB (21GB available) eMMC 5.1 | 8GB (5GB available) eMMC 4.5 |
| External storage | Until 256GB microSD, microSDXC (dedicated slot) | Until 32GB microSD, microSDHC (dedicated slot) |
📶 Mobile networks | ||
| Galaxy J7 Duo (SM-J720M/DS) | Galaxy S3 Slim Duos (SM-G3812B) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card (dedicated slot) | Dual-SIM Standby - Call active on one sim card (dedicated slot) |
| SIM card | 2 slots (Dual-SIM) micro-SIM (3FF) | 2 slots (Dual-SIM) micro-SIM (3FF) |
| Maximum Download / Upload | 150/50 Mbps | 21/5.76 Mbps |
| Network technology | 2G, 3G, 4G | 2G, 3G |
| Frequency, bands | Expand band details Collapse details | |
| GSM MHz band | Quad-Band 850/900/1800/1900 | Quad-Band 850/900/1800/1900 |
| Primary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 850/900/1700/1900/2100 | UMTS 850/1900/2100 |
| Primary 4G network | LTE Cat4 (1, 3, 4, 5, 7, 8, 12, 13, 17, 28, 66) TD-LTE (38, 40, 41) | Not supported |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+ |
| Secondary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Secondary 3G network | UMTS 850/900/1700/1900/2100 | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+ | GPRS, EDGE |
📷 Camera | ||
| Galaxy J7 Duo (SM-J720M/DS) | Galaxy S3 Slim Duos (SM-G3812B) | |
| Back camera (main camera) | (dual camera) 13 megapixels 5MP depth f/1.9 | 5 megapixels |
| Main camera resolution | 4128x3096 pixels | 2592x1944 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps | Full HD (1920x1080) 30 fps |
| Flash | LED flash on both cameras | LED flash |
| Focal aperture | f/1.9 (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 | Autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | EIS: Digital stabilization | EIS: Digital stabilization |
| Zoom | Only digital zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
| BSI sensor | Not supported | Not supported |
| HDR | HDR photo only main camera | HDR photo only main camera |
| Camera extras | feature not registered | feature not registered |
📸 Front camera | ||
| Galaxy J7 Duo (SM-J720M/DS) | Galaxy S3 Slim Duos (SM-G3812B) | |
| Front camera (secondary) | 8 megapixels | 0.3 megapixels |
| Front camera resolution | 3264x2448 pixels | 640x480 pixels |
| Video recording (secondary) | Full HD (1920x1080) | VGA (640x480) |
| Front flash | LED | Not supported |
| Focal aperture | f/1.9 (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 |
🔉 Sound and multimedia | ||
| Galaxy J7 Duo (SM-J720M/DS) | Galaxy S3 Slim Duos (SM-G3812B) | |
| Loudspeaker | Mono sound (not stereo) | Mono sound (not stereo) |
| Active noise cancellation | Not supported | 1 microphone |
| Radio | FM | FM |
| TV | Not supported | Not supported |
| Video formats | MP4, H.264, H.263, XviD, MKV | MP4, H.264, H.263, XviD, MKV |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, WMA, eAAC+, FLAC |
🔌 Connectivity | ||
| Galaxy J7 Duo (SM-J720M/DS) | Galaxy S3 Slim Duos (SM-G3812B) | |
| USB | MicroUSB 2.0 | MicroUSB 2.0 |
| Audio output | 3.5mm jack | 3.5mm jack |
| TV output | Not supported | Not supported |
| Bluetooth | 5.0 + A2DP/LE | 4.0 + A2DP |
| WiFi | 802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot | 802.11 b/g/n [wifi4] (2.4GHz) WiFi Direct, hotspot |
| DLNA | Not supported | Supported |
| GPS | A-GPS, GeoTagging, GLONASS, BeiDou | A-GPS, GeoTagging |
| NFC | Not supported | Not supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Galaxy J7 Duo (SM-J720M/DS) | Galaxy S3 Slim Duos (SM-G3812B) | |
| Sensors | Accelerometer ANT+ Face unlock 2D Fingerprint sensor (front-mounted) Proximity sensor | Accelerometer Ambient light sensor Compass Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Galaxy J7 Duo (SM-J720M/DS) | Galaxy S3 Slim Duos (SM-G3812B) | |
| Battery type | Li-Ion: lithium-ion (Removable) | Li-Ion: lithium-ion (Removable) |
| Battery capacity | 3000 mAh | 2100 mAh |
| Charger, watts | Wired charging | Wired charging |
| Inductive / wireless charging | Not supported | Not supported |
| Talk time autonomy | 20 hours | feature not registered |
| Standby | feature not registered | feature not registered |
➕ Other features | ||
| Galaxy J7 Duo (SM-J720M/DS) | Galaxy S3 Slim Duos (SM-G3812B) | |
| Call control | Voice dialing, Voice recorder | 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 | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 | HTML, XHTML, HTML5 |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: Black, Gold, Rose Gold, White • Samsung Pay | • Colors: Black, White • Java framework |
☢️ Radiation rate | ||
| Galaxy J7 Duo (SM-J720M/DS) | Galaxy S3 Slim Duos (SM-G3812B) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | 0.97W/kg (head), 0.55W/kg (body) | 0.61W/kg (head), 1.13W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | 0.553W/kg (head), 0.395W/kg (body) |