Samsung M400 vs Samsung Galaxy M21
| Type | Clamshell | Touch |
| Dimensions | 96.50 x 48.30 x 17.80 mm | 159.00 x 75.10 x 8.90 mm |
| Weight | 104.90 g | 188.00 g |
| Display size | 2.40" | 6.40" |
| Display | Color / TFT 256k colors 240 x 320 px (2.40") | Color / Super AMOLED 16M colors 1080 x 2340 px (6.40") 403 ppi |
| Display protection |   | |
| Additional display | Color / STN (1.04") | |
| Protection of the secondary display | | |
| Talk time (max.) | 2G: 240 min. (4.0 h) | 4G: 2940 min. (49.0 h) |
| Stand-by (max.) | 2G: 600 h. (25.0 days) |  |
| Playback time (max.) | nd | Audio: 131 h (5.5 days) Video: 29 h (1.2 days) |
| Internet browsing time (max.) | nd | WiFi: 22 h (0.9 days) 4G: 22 h (0.9 days) |
| Standard battery | Li-Ion 1000 mAhBuy powerbank
| Li-Ion 6000 mAhBuy powerbank
|
| Quick battery charging | | Fast Charging |
| Wireless battery charging | | |
| Phonebook memory | 500 places | |
| Internal memory | 256 MB | 64 GB |
| End-user memory | | 49.5 GB |
| RAM memory | 128 MB | 4 GB |
| Memory cards | |  microSD, microSDHC, microSDXC up to 512 GBBuy memory card |
| Operating system | - | Android 10 |
| Interface | - | One UI |
| Processor | Qualcomm QSC6155 | Samsung Exynos 9611 |
| Processor clock | 480 MHz | 2300 MHz |
| GPU | - | ARM Mali-G72 MP3 |
| Touchscreen | | |
| SAR (10g) | | 1,13 W/kg |
| DualSIM | | |
| SIM cards standard | | DualSIM(nanoSIM, nanoSIM) |
| DualSIM mode | nd | dual standby |
| Hybrid DualSIM | nd | |
| Announced | | 1Q 2020 |
| Other names | SPH-M400 | SM-M215F/DS; SM-M215F/DSN |
| GSM frequencies | | 850 900 1800 1900 |
| UMTS | | 850 900 1900 2100 |
| LTE standard | | FDD LTE: 2600, 2100, 1800, 900, 850, 800 TDD LTE: 2600, 2500, 2300 |
| Standard 5G | | |
| CDMA | 850 1900 CDMA2000 1X | |
| Standard TD-SCDMA | | |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Camera type | | Standard |
| Photo matrix | 1.3 Mpx | 48 Mpx |
| Sensor size | | 1/2 |
| Resolution | | 8000x6000 px |
| Optical zoom | | |
| Digital zoom | | 4x |
| Field of view | | 80 ° |
| Focal length | | 26 mm |
| Flash | | LED |
| Dual-colour LED flash | | |
| Video resolution | nd | 3840x2160 px |
| Video formats | nd | H.264, H.265, MPEG4 - 30 fps |
| Additional | - | AF, f/2.0 |
| Second 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.264, H.265, MPEG4 - 30 fps |
| Additional | nd | FF, f/2.2 |
| Third camera | | |
| Camera type | nd | Wide-angle |
| Photo matrix | nd | 8 Mpx |
| Sensor size | nd | 1/4 |
| Pixel size | nd | 1,12 µm |
| Optical zoom | nd | |
| Field of view | nd | 123 ° |
| Focal length | nd | 12 mm |
| Flash | nd | LED |
| Dual-colour LED flash | nd | |
| Video formats | nd | H.264, H.265, MPEG4 - 30 fps |
| Additional | nd | FF, f/2.2 |
CAMERAS - FRONT
| First camera | | |
| Camera type | nd | Portrait |
| Photo matrix | nd | 20 Mpx |
| Optical zoom | nd | |
| Flash | nd | |
| Dual-colour LED flash | nd | |
| Video formats | nd | H.264, H.265, MPEG4 - 30 fps |
| Additional | nd | FF, f/2.0 |
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 |
| HSUPA | | 5.76 Mbit/s |
| HSPA | | |
| HSPA+ | | |
| LTE DL | | 603.00 Mbit/s |
| LTE UP | | 102.00 Mbit/s |
| WIMAX+ | | |
| GPRS | | |
| EDGE | | |
| Bluetooth | v3.0 | v5.0 |
| A2DP Profile | | |
| HDMI | | |
| WiFi | | v802.11 a/b/g/n/ac |
| WiFi frequencies | | 2,4 GHz; 5 GHz |
| WiFi Direct | | |
| WiFi Display | | |
| DLNA | | |
| Miracast | | |
| WiFi hotspot | | |
| IrDA | | |
| USB | v2.0 | 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 |
| Hardware QWERTY keyboard | | |
| RSS Reader | | |
Multimedia
| Radio | | |
| MP3 | | |
| Stereo speakers | | |
| Audio Jack | | 3.5 mm |
| HD Voice | | |
| Sound formats | | 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 |
| 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 | | |