| Physical features | Xiaomi Redmi 8 (32GB) | Samsung Galaxy J4 (SM-J400M) |
| Model | Redmi 8 (32GB) | Galaxy J4 (SM-J400M) |
| Other model names | Xiaomi Redmi 8 (3GB RAM + 32GB) M1908C3IC, MZB8255IN | Galaxy J4 J400M Single-sim, SM-J400MZKMTCE |
| Country or region available | 
(Global, International) | 
(Latin America) |
| Brand | Xiaomi | Samsung |
| Release date | October, 2019 | May, 2018 |
| Depth | 9.4 millimeters (0.37 inches) | 8.1 millimeters (0.32 inches) |
| Size (width x height) | 75.4 x 156.5 millimeters (2.97 x 6.16 in) | 77.2 x 151.7 millimeters (3.04 x 5.97 in) |
| Weight | 188 grams (6.58 ounces) | 175 grams (6.13 ounces) |
| Qwerty physical keyboard | Not supported | Not supported |
| Antenna | Internal antenna | Internal antenna |
| Build, materials | Plastic body, glass front | Plastic body |
| Protection against water and others | P2i certified: water repellent nano-coating | Not supported |
| System (OS) | Xiaomi Redmi 8 (32GB) | Samsung Galaxy J4 (SM-J400M) |
| Operating system | Android 9.0 Pie | Android 8.0 Oreo |
| Firmware update | feature not registered | Android 9.0 Pie |
| Hardware | Xiaomi Redmi 8 (32GB) | Samsung Galaxy J4 (SM-J400M) |
| Chipset | 64bit - Qualcomm Snapdragon 439 SDM439 (12nm) | 64bit - Samsung Exynos 7 Quad 7570 (14nm) |
| CPU processor | Octa-Core, 2 processors:
2Ghz Dual-Core ARM Cortex-A53
1.45Ghz Hexa-Core ARM Cortex-A53 | 1.4Ghz Quad-Core ARM Cortex-A53 |
| GPU graphical controller | Qualcomm Adreno 505 650Mhz | ARM Mali-T720 MP2 |
| RAM memory | 3GB LPDDR3 | 2GB LPDDR3 |
| Internal storage | 32GB (21GB available)
eMMC 5.1 | 32GB (22GB available)
Flash (EEPROM) |
| External storage | Until 512GB microSD, microSDXC
(dedicated slot) | Until 256GB microSD, microSDXC
(dedicated slot) |
| Display | Xiaomi Redmi 8 (32GB) | Samsung Galaxy J4 (SM-J400M) |
| Display type | TFT IPS LCD | Super AMOLED |
| Screen size | 6.22" inches | 5.5" inches |
| Screen-to-body ratio | ~81.8% (screen-to-body ratio) | ~71.2% (screen-to-body ratio) |
| Display resolution | 720x1520 pixels | 720x1280 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 270 PPI | 267 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass 5 | Not supported |
| Display features | feature not registered | feature not registered |
| Mobile networks | Xiaomi Redmi 8 (32GB) | Samsung Galaxy J4 (SM-J400M) |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card
(dedicated slot) | Not supported |
| SIM card | 2 slots (Dual-SIM)
nano-SIM (4FF) | 1 slot (Single-SIM)
micro-SIM (3FF) |
| Maximum download/upload | 150/50 Mbps | 150/50 Mbps |
| Network technology | 2G, 3G, 4G | 2G, 3G, 4G |
| Frequency, bands | Expand band detailsCollapse 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 | M1908C3IC version:
UMTS 850/900/1700/1900/2100
MZB8255IN version:
UMTS 850/900/1900/2100 | UMTS 850/900/1700/1900/2100 |
| Primary 4G network | LTE Cat4
VoLTE
M1908C3IC version:
LTE (Bands 1, 2, 3, 4, 5, 7, 8, 20)
TD-LTE (Bands 38, 40)
MZB8255IN version:
LTE (Bands 1, 3, 5, 8)
TD-LTE (Bands 40, 41) | LTE Cat4 (Bands 1,2,3,4,5,7,8,12,13,17,28,66) |
| 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+, LTE |
| Secondary 2G network | GSM 850/900/1800/1900 | Not supported |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | GPRS, EDGE | Not supported |
| Calling | Xiaomi Redmi 8 (32GB) | Samsung Galaxy J4 (SM-J400M) |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (T9), MMS, E-mail, Push mail |
| Speakerphone | Supported | Supported |
| Video calling | Supported | Supported |
| Call control | Voice dialing, Voice recorder | Voice dialing, Voice recorder |
| Camera | Xiaomi Redmi 8 (32GB) | Samsung Galaxy J4 (SM-J400M) |
| Back camera (main camera) | (dual camera)
12 megapixels
2MP depth | 13 megapixels |
| Main camera resolution | 4000x3000 pixels | 4128x3096 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps | Full HD (1920x1080) 30 fps |
| Flash | LED flash | LED flash on both cameras |
| Focal aperture | f/1.8 (aperture) | f/1.9 (aperture) |
| Focal length | feature not registered | 28mm lens |
| Sensor size | 1/2.55" inches | feature not registered |
| Pixel size | 1.4µm pixel | feature not registered |
| Autofocus | PDAF: phase detection 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 on both cameras | HDR photo only main camera |
| 2ª camera | Xiaomi Redmi 8 (32GB) | Samsung Galaxy J4 (SM-J400M) |
| Front camera (secondary) | 8 megapixels | 5 megapixels |
| Front camera resolution | 3264x2448 pixels | 2560x1920 pixels |
| Video recording (secondary) | Full HD (1920x1080) | HD (1280x720) |
| Front flash | Not supported | LED |
| Focal aperture | f/2.0 (aperture) | f/2.2 (aperture) |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | 1.12µm pixel | feature not registered |
| Multimedia | Xiaomi Redmi 8 (32GB) | Samsung Galaxy J4 (SM-J400M) |
| Radio | FM | FM |
| TV | Not supported | Not supported |
| Video formats | MP4, H.264, H.263, XviD, MKV | MP4, H.264, H.263, MKV, WMV |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, OGG, eAAC+, FLAC |
| Connectivity | Xiaomi Redmi 8 (32GB) | Samsung Galaxy J4 (SM-J400M) |
| USB | USB 2.0 Type-C, USB OTG On-The-Go | MicroUSB 2.0, USB OTG On-The-Go |
| TV output | Not supported | Not supported |
| Audio output | 3.5mm jack | 3.5mm jack |
| Bluetooth | 4.2 + A2DP | 4.2 + A2DP |
| WiFi | 802.11 b/g/n (2.4Ghz) | 802.11 b/g/n (2.4Ghz) |
| DLNA | Not supported | Not supported |
| NFC | Not supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou | A-GPS, GeoTagging, GLONASS, BeiDou |
| Infrared port | Supported | Not supported |
| Other functions | Xiaomi Redmi 8 (32GB) | Samsung Galaxy J4 (SM-J400M) |
| Active noise cancellation | Supported | Not supported |
| Vibrating alert | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 | HTML, XHTML, HTML5 |
| Sensors | Accelerometer
Proximity sensor
Compass
Ambient Light sensor
Face unlock
Fingerprint sensor (rear-mounted)
| Accelerometer
Proximity sensor
|
| Other features | - Colors: Onyx Black, Ruby Red, Sapphire Blue, Green
- MIUI 9
- WiFi direct, hotspot | - Colors: Black, Gold, Orchid Gray
- WiFi direct, hotspot |
| Power supply | Xiaomi Redmi 8 (32GB) | Samsung Galaxy J4 (SM-J400M) |
| Battery | LiPo: Li-Ion polymer (Non removable) | Li-Ion: Lithium-Ion (Removable) |
| Battery capacity | 5000 mAh | 3000 mAh |
| Charger, watts | 18W Fast battery charging | Standard charging |
| Talk time autonomy | 1680 minutes | 28 hours | 1.2 days | 1200 minutes | 20 hours | 0.8 day |
| Standby | feature not registered | feature not registered |
| Radiation rate | Xiaomi Redmi 8 (32GB) | Samsung Galaxy J4 (SM-J400M) |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |