Samsung Galaxy S8 SM-G950U vs Samsung Galaxy A31
| Type | Touch | Touch |
| Waterproofness & dust-resistance | IP68 |  |
| Dimensions | 148.90 x 68.10 x 8.00 mm | 159.30 x 73.10 x 8.60 mm |
| Weight | 155.00 g | 185.00 g |
| Display size | 5.80" | 6.40" |
| Display | Color / Super AMOLED 16M colors 1440 x 2960 px (5.80") 568 ppi | Color / Super AMOLED 16M colors 1080 x 2400 px (6.40") 411 ppi |
| Display protection | Corning Gorilla Glass Buy screen protector
 |  |
| Additional display | | |
| Protection of the secondary display | | |
| Talk time (max.) | 3G: 1200 min. (20.0 h) | |
| Playback time (max.) | Audio: 67 h (2.8 days) Video: 16 h (0.7 days) | nd |
| Internet browsing time (max.) | WiFi: 14 h (0.6 days) 3G: 11 h (0.5 days) 4G: 12 h (0.5 days) | nd |
| Standard battery | Li-Ion 3000 mAhBuy powerbank
| Li-Po 5000 mAhBuy powerbank
|
| Quick battery charging | Quick Charge | Fast Charging |
| Wireless battery charging | PMA & Qi | |
| Internal memory | 64 GB | 64 GB |
| End-user memory | 52.3 GB | 46.2 GB |
| RAM memory | 4 GB | 4 GB |
| Memory cards |  microSD, microSDHC, microSDXC up to 256 GBBuy memory card | microSD, microSDHC, microSDXC up to 512 GBBuy memory card |
| Operating system | Android 7.0 Nougat | Android 10 |
| Interface | Samsung Experience | One UI |
| Processor | Qualcomm Snapdragon 835 8998 | MediaTek Helio P65 MT6768 |
| Processor clock | 2350 MHz | 2000 MHz |
| GPU | Adreno 540 | ARM Mali-G52 @820 MHz |
| Touchscreen | | |
| DualSIM | | |
| SIM cards standard | SingleSIM(nanoSIM) | DualSIM(nanoSIM, nanoSIM) |
| DualSIM mode | nd | dual standby |
| Announced | 2Q 2017 | 1Q 2020 |
| Other names | - | SM-A315F; SM-A315G/L; SM-A315N |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | 850 900 1900 2100 | 850 900 1700 1900 2100 |
| LTE standard | FDD LTE: 2600, 2100, 1900, 1800, 1700, 900, 850, 800, 700 TDD LTE: 2600, 2500, 2300, 1900 | FDD LTE: 2600, 2100, 1800, 900, 850, 800 TDD LTE: 2600, 2500, 2300 |
| Standard 5G | | |
| CDMA | | |
| Standard TD-SCDMA | | |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Camera type | | Standard |
| Photo sensor model | Samsung S5K2L2 | |
| Photo matrix | 12 Mpx | 48 Mpx |
| Resolution | 4032x3024 px | |
| Optical zoom | | |
| Digital zoom | 8x | 8x |
| Flash | LED | LED |
| Dual-colour LED flash | | |
| Video resolution | 3840x2160 px | |
| Video formats | H.263, H.264, MPEG4 - 30 fps | H.263, H.264, MPEG4 - 30 fps |
| Additional | AF, OIS, f/1.7 | AF, f/2.0 |
| Second camera | | |
| Camera type | nd | Wide-angle |
| Photo matrix | nd | 8 Mpx |
| Optical zoom | nd | |
| Flash | nd | LED |
| Dual-colour LED flash | nd | |
| Video formats | nd | H.263, H.264, MPEG4 - 30 fps |
| Additional | nd | FF, f/2.2 |
| Third camera | | |
| Camera type | nd | Depth of field |
| Photo matrix | nd | 5 Mpx |
| Optical zoom | nd | |
| Flash | nd | LED |
| Dual-colour LED flash | nd | |
| Video formats | nd | H.263, H.264, MPEG4 - 30 fps |
| Additional | nd | FF, f/2.4 |
| Fourth camera | | |
| Camera type | nd | Macro |
| Photo matrix | nd | 5 Mpx |
| Optical zoom | nd | |
| Flash | nd | LED |
| Dual-colour LED flash | nd | |
| Video formats | nd | H.263, H.264, MPEG4 - 30 fps |
| Additional | nd | FF, f/2.4 |
CAMERAS - FRONT
| First camera | | |
| Camera type | | Portrait |
| Photo sensor model | Samsung S5K3H1 | |
| Photo matrix | 8 Mpx | 20 Mpx |
| Resolution | 3264x2448 px | |
| Optical zoom | | |
| Flash | | |
| Dual-colour LED flash | | |
| Video resolution | 2560x1440 px | |
| Video formats | H.263, H.264, MPEG4 - 30 fps | H.263, H.264, MPEG4 - 30 fps |
| Additional | AF, f/1.7 | FF, f/2.2 |
SENSORS
| Accelerometer | | |
| Proximity | | |
| Light | | |
| Magnetometer | | |
| Gyroscope | | |
| Barometer | | |
| Altimeter | | |
| Gravity | | |
| Hall-effect | | |
| Iris scanner | | |
| Fingerprint scanner | | |
| Thermometer | | |
| Hygrometer | | |
Data transfer
| xHTML | | |
| WAP | v2.0 | v2.0 |
| HSCSD | | |
| HSDPA | 42.20 Mbit/s | 42.20 Mbit/s |
| HSUPA | 5.76 Mbit/s | 5.76 Mbit/s |
| HSPA | | |
| HSPA+ | | |
| LTE DL | 979.00 Mbit/s | - |
| LTE UP | - | - |
| WIMAX+ | | |
| GPRS | | |
| EDGE | | |
| Bluetooth | v5.0 | v5.0 |
| A2DP Profile | | |
| HDMI | | |
| WiFi | v802.11 a/b/g/n/ac | v802.11 a/b/g/n/ac |
| WiFi frequencies | 2,4 GHz; 5 GHz | 2,4 GHz; 5 GHz |
| WiFi Direct | | |
| DLNA | | |
| Miracast | | |
| WiFi hotspot | | |
| IrDA | | |
| USB | v3.1 Type-C | v2.0 Type-C |
| GPS | | |
| A-GPS | | |
| GLONASS | | |
| Beidou | | |
| Galileo | | |
| QZSS | | |
| NFC | | |
COMMUNICATION AND MESSAGING
| Call waiting | | |
| Conferency | | |
| Call forwarding | | |
| Push To Talk | | |
| Instant Messenger | | |
| SMS | | |
| EMS | | |
| MMS | | |
| Dictionary | T9 | T9 |
| Swype | | |
| e-mail client | POP3, IMAP4, SMTP | POP3, IMAP4, SMTP |
| Hardware QWERTY keyboard | | |
| RSS Reader | | |
Multimedia
| Radio | | |
| MP3 | | |
| Stereo speakers | | |
| Audio Jack | 3.5 mm | 3.5 mm |
| HD Voice | | |
| Sound formats | 3GA, AAC, AMR, AWB, FLAC, IMY, M4A, MID, MIDI, MXMF, OGA, OGG, OTA, RTTTL, RTX, WAV, WMA, XMF | 3GA, AAC, AAC+, AMR, AWB, FLAC, IMY, M4A, MID, MXMF, OGA, OGG, OTA, RTTTL, RTX, WAV, WMA, XMF, eAAC+ |
| Polyphony | | |
| Video ringtone | | |
| Ring composer | | |
| Games | | |
| Java | ART | ART |
| Videophone | | |
| DVB-H television | | |
| TV-Out | | |
PIM AND ADDITIONAL FUNCTIONS
| Watch | | |
| Stopwatch | | |
| Alarm | | |
| Calculator | | |
| Currency converter | | |
| Organizer | | |
| Calendar | | |
| Flight mode | | |
| SyncML | | |
| Data and fax | | |
| Screensaver | | |
| Themes | | |
| Interchangeable covers | | |
| Voice dial | | |
| Speakerphone | | |
| Recorder | | |
| Vibrations | | |