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Samsung Galaxy J7 Star (SM-J737T) vs Samsung Galaxy A31 (SM-A315G/DSL)

Side by side comparison between Samsung Galaxy J7 Star vs Samsung Galaxy A31 phones, differences, pros, cons with full specifications. What's the better?

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Compare Samsung Galaxy A31 XSamsung Galaxy J7 Star (SM-J737T)07Points
Samsung Galaxy J7 Star (SM-J737T)
5.5"
TFT

720x1280

13
MP

13mp

2GB
RAM

64bit Octa

3300
mAh

(Non removable)

vs
16PointsSamsung Galaxy A31 (SM-A315G/DSL)Compare Samsung Galaxy J7 Star X
Samsung Galaxy A31 (SM-A315G/DSL)
6.4"
AMOLED

1080x2400

48
MP

20mp

4GB
RAM

64bit Octa

5000
mAh

(Non removable)

What's the better phone? Samsung Galaxy A31 (SM-A315G/DSL)

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!

Galaxy J7 Star (SM-J737T)7 Advantages Samsung Galaxy J7 Star (SM-J737T)vsGalaxy A31 (SM-A315G/DSL)16 Advantages Samsung Galaxy A31 (SM-A315G/DSL)
+181 grams (6.34 ounces)2%
Lighter
vs185 grams (6.48 ounces)
+f/1.7 (aperture)18%
Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.
vsf/2.0 (aperture)
+(4G+ LTE-A) 300 Mbps100%
Faster for surfing the internet and download files
vs(4G LTE) 150 Mbps
+Proximity sensorAdvantage
Sensors help you use the device
vsNot supported
+ANT+Advantage
Sensors help you use the device
vsNot supported
+NFCAdvantage
NFC allows you to make payments by approach quickly and securely
vsNot supported
+Gorilla Glass 5Advantage
Protection against scratches on the screen lets you carry your phone with your keys
vsNot supported
1.6Ghz 64bit Octa-Corevs+2Ghz 64bit Octa-Core34%
More powerful processor, you can open your applications faster
2GB LPDDR3vs+4GB LPDDR4X100%
More RAM memory. Typically more responsive and better for multitasking.
16GB (10GB available)vs+128GB (104GB available)9 times
More internal storage for applications and files
TFT LCDvs+Super AMOLEDAdvantage
Super AMOLED display is brighter and more vivid
720x1280 pixelsvs+1080x2400 pixels181%
Higher resolution screen
267 PPIvs+411 PPI54%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
5.5"vs+6.4"16%
Larger screen
(back) 13MPvs+(quad camera) 48MP + 8MP + 5MP + 5MP4 times
Higher resolution main camera
(front) 13MPvs+(front) 20MP56%
Higher resolution secondary camera to take pictures and selfies
Android 9.0 Pievs+Android 10Advantage
Android 10 is newer and safer
Not supportedvs+Fingerprint sensor (under display)Advantage
Sensors help you use the device
3300 mAhvs+5000 mAh52%
Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
1 slot (Single-SIM)
(dedicated slot)
vs+2 slots (Dual-SIM)
(dedicated slot)Advantage
It's more advantageous to have more than one phone operator in the same device
Not supportedvs+FMAdvantage
The radio lets you listen to your songs and sports in general
4.2 + A2DPvs+5.0 + A2DP/LEAdvantage
Bluetooth 5.0 + A2DP/LE is newer and faster
MicroUSB 2.0, USB OTG On-The-Govs+Type-CAdvantage
Reversible connector, you can stick in a USB-C cable any which way; either side is up.

30 Common items in both devices
eMMC 5.1
Until 512GB microSD, microSDXC / Until 1TB microSD, microSDXC
8.6 millimeters (0.34 inches)
Plastic body, glass front
16 million
LED flash
Only digital zoom
+23 specs and more in the table below

Check the comparison table below for more items that are not evaluated in comparison score above.

Highlight differencesClear highlight
Physical featuresSamsung Galaxy J7 Star (SM-J737T)Samsung Galaxy A31 (SM-A315G/DSL)
ModelGalaxy J7 Star (SM-J737T)Galaxy A31 (SM-A315G/DSL)
Other model namesGalaxy J7 2018 (T-Mobile) SM-J737TZSATMBGalaxy A31 SM-A315GZKKZTO (128GB + 4GB RAM)
Country or region availableUSA
USA
(Latin America)Brazil
(Latin America), Brazil
BrandSamsungSamsung
Release dateJuly, 2018April, 2020
Depth8.6 millimeters (0.34 inches)8.6 millimeters (0.34 inches)
Size (width x height)76.2 x 153.2 millimeters (3 x 6.03 in)73.1 x 159.3 millimeters (2.88 x 6.27 in)
Weight181 grams (6.34 ounces)185 grams (6.48 ounces)
Qwerty physical keyboardNot supportedNot supported
AntennaInternal antennaInternal antenna
Build, materialsPlastic body, glass frontPlastic body, glass front
Protection against water and othersNot supportedNot supported
System (OS)Samsung Galaxy J7 Star (SM-J737T)Samsung Galaxy A31 (SM-A315G/DSL)
Operating systemAndroid 8.0 OreoAndroid 10
Firmware updateAndroid 9.0 Piefeature not registered
HardwareSamsung Galaxy J7 Star (SM-J737T)Samsung Galaxy A31 (SM-A315G/DSL)
Chipset64bit - Samsung Exynos 7 Octa 7870 (14nm)64bit - MediaTek MT6768 Helio P65 (12nm)
CPU processor1.6Ghz Octa-Core ARM Cortex-A53Octa-Core, 2 processors:
2Ghz Dual-Core ARM Cortex-A75
1.7Ghz Hexa-Core ARM Cortex-A55
GPU graphical controllerARM Mali-T830 MP1 700MhzARM Mali-G52 MC2 820Mhz
RAM memory2GB LPDDR34GB LPDDR4X
Internal storage16GB (10GB available)
eMMC 5.1
128GB (104GB available)
eMMC 5.1
External storageUntil 512GB microSD, microSDXC
(dedicated slot)
Until 1TB microSD, microSDXC
(dedicated slot)
DisplaySamsung Galaxy J7 Star (SM-J737T)Samsung Galaxy A31 (SM-A315G/DSL)
Display typeTFT LCDSuper AMOLED
Screen size5.5" inches6.4" inches
Screen-to-body ratio~71.4% (screen-to-body ratio)~84.9% (screen-to-body ratio)
Display resolution720x1280 pixels1080x2400 pixels (20:9)
TouchscreenCapacitive MultitouchCapacitive Multitouch
Pixel density (dot pitch)267 PPI411 PPI
Colors16 million16 million
Scratch-resistant glassGorilla Glass 5Not supported
Display featuresfeature not registered60Hz
Mobile networksSamsung Galaxy J7 Star (SM-J737T)Samsung Galaxy A31 (SM-A315G/DSL)
Dual-SIMNot supportedDual-SIM Standby - Call active on one sim card
(dedicated slot)
SIM card1 slot (Single-SIM)
nano-SIM (4FF)
2 slots (Dual-SIM)
nano-SIM (4FF)
Maximum download/upload300/50 Mbps150/50 Mbps
Network technology2G, 3G, 4G2G, 3G, 4G
Frequency, bandsExpand band detailsCollapse details
GSM Mhz bandQuad-Band 850/900/1800/1900Quad-Band 850/900/1800/1900
Primary 2G networkGSM 850/900/1800/1900GSM 850/900/1800/1900
Primary 3G networkUMTS 850/1700/1900UMTS 850/900/1700/1900/2100
Primary 4G networkLTE Cat6 (Bands 2, 4, 5, 7, 12, 66, 71)LTE Cat4 (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 28, 66)
TD-LTE (Bands 38, 40, 41)
Primary 5G networkNot supportedNot supported
Primary data networkGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE, LTE-AGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE
Secondary 2G networkNot supportedGSM 850/900/1800/1900
Secondary 3G networkNot supportedNot supported
Secondary 4G networkNot supportedNot supported
Secondary data networkNot supportedGPRS, EDGE
CallingSamsung Galaxy J7 Star (SM-J737T)Samsung Galaxy A31 (SM-A315G/DSL)
MessagingSMS (T9), MMS, E-mail, Push mailSMS (T9), MMS, E-mail, Push mail
SpeakerphoneSupportedSupported
Video callingSupportedSupported
Call controlVoice dialing, Voice recorder, Voice commandsVoice dialing, Voice recorder, Voice commands
CameraSamsung Galaxy J7 Star (SM-J737T)Samsung Galaxy A31 (SM-A315G/DSL)
Back camera (main camera)13 megapixels(quad camera)
48 megapixels
8MP ultrawidef/2.213mm1/4.0"1.12µm
5MP macrof/2.4
5MP depthf/2.4
Main camera resolution4128x3096 pixels8000x6000 pixels
Video recording (primary)Full HD (1920x1080) 30 fpsFull HD (1920x1080) 30 fps
FlashLED flashLED flash
Focal aperturef/1.7 (aperture)f/2.0 (aperture)
Focal lengthfeature not registered26mm lens
Sensor sizefeature not registered1/2" inches
Pixel sizefeature not registered0.8µm pixel
AutofocusAutofocusPDAF: phase detection autofocus
Touch focusSupportedSupported
Image stabilizationEIS: Digital stabilizationEIS: Digital stabilization
ZoomOnly digital zoomOnly digital zoom
Face/smile detectionFace detection, Smile detectionFace detection, Smile detection
BSI sensorNot supportedNot supported
HDRHDR photo on both camerasHDR photo on both cameras
2ª cameraSamsung Galaxy J7 Star (SM-J737T)Samsung Galaxy A31 (SM-A315G/DSL)
Front camera (secondary)13 megapixels20 megapixels
Front camera resolution4128x3096 pixels5184x3840 pixels
Video recording (secondary)Full HD (1920x1080)Full HD (1920x1080)
Front flashNot supportedNot supported
Focal aperturef/1.7 (aperture)f/2.2 (aperture)
Focal lengthfeature not registeredfeature not registered
Sensor sizefeature not registeredfeature not registered
Pixel sizefeature not registeredfeature not registered
MultimediaSamsung Galaxy J7 Star (SM-J737T)Samsung Galaxy A31 (SM-A315G/DSL)
RadioNot supportedFM
TVNot supportedNot supported
Video formatsMP4, H.265, H.264, H.263, XviD, MKVMP4, H.265, H.264, H.263, XviD, MKV
Audio formatsMP3, WAV, WMA, eAAC+, FLACMP3, WAV, WMA, eAAC+, FLAC
ConnectivitySamsung Galaxy J7 Star (SM-J737T)Samsung Galaxy A31 (SM-A315G/DSL)
USBMicroUSB 2.0, USB OTG On-The-GoUSB 2.0 Type-C, USB OTG On-The-Go
TV outputNot supportedNot supported
Audio output3.5mm jack3.5mm jack
Bluetooth4.2 + A2DP5.0 + A2DP/LE
WiFi802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO
DLNANot supportedNot supported
NFCSupportedNot supported
GPSA-GPS, GeoTagging, GLONASSA-GPS, GeoTagging, GLONASS, GALILEO, BeiDou
Infrared portNot supportedNot supported
Other functionsSamsung Galaxy J7 Star (SM-J737T)Samsung Galaxy A31 (SM-A315G/DSL)
Active noise cancellationSupportedSupported
Vibrating alertSupportedSupported
RingtonesPolyphonic and customizedPolyphonic and customized
Web browserHTML, XHTML, HTML5HTML, XHTML, HTML5
SensorsAccelerometer
Proximity sensor
Compass
Ambient Light sensor
Gyroscope
Face unlock
ANT+
Accelerometer
Compass
Ambient Light sensor
Gyroscope
Face unlock
Fingerprint sensor (under display)
Other features- Colors: Black, Blue
- One UI
- WiFi direct, hotspot
- Colors: Prism Black, Prism Blue, Prism Red, Prism White
- One UI 2.0
- WiFi direct, hotspot
Power supplySamsung Galaxy J7 Star (SM-J737T)Samsung Galaxy A31 (SM-A315G/DSL)
BatteryLi-Ion: Lithium-Ion (Non removable)LiPo: Li-Ion polymer (Non removable)
Battery capacity3300 mAh5000 mAh
Charger, watts Standard charging15W Fast battery charging
Talk time autonomy1860 minutes | 31 hours | 1.3 daysfeature not registered
Standby46080 minutes | 768 hours | 32 daysfeature not registered
Radiation rateSamsung Galaxy J7 Star (SM-J737T)Samsung Galaxy A31 (SM-A315G/DSL)
SAR 1.6W/kg (USA, Mexico, etc.)1.36W/kg (head) | 1.58W/kg (body)0.53W/kg (head) | 0.82W/kg (body)
SAR 2W/kg (Europe, UK, etc.)feature not registeredfeature not registered
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