Ulefone S1 vs Xiaomi Redmi Note 4X
| Type | Touch | Touch |
| Dimensions | 148.60 x 70.70 x 9.55 mm | 151.00 x 76.00 x 8.45 mm |
| Weight | 183.00 g | 165.00 g |
| Display size | 5.50" | 5.50" |
| Display | Color / IPS TFT 16M colors 480 x 960 px (5.50") 195 ppi | Color / IPS TFT 16M colors 1080 x 1920 px (5.50") 401 ppi |
| Display protection |   | |
| Additional display | | |
| Protection of the secondary display | | |
| Talk time (max.) | 2G: 660 min. (11.0 h) | 2G: 3060 min. (51.0 h) |
| Stand-by (max.) | 2G: 250 h. (10.4 days) | 4G: 264 h. (11.0 days) |
| Playback time (max.) | Audio: 23 h (1.0 days) Video: 6 h (0.3 days) | Audio: 162 h (6.8 days) Video: 18 h (0.8 days) |
| Standard battery | Li-Po 3000 mAhBuy powerbank
| Li-Po 4100 mAhBuy powerbank
|
| Quick battery charging | |  |
| Wireless battery charging | | |
| Internal memory | 8 GB | 16 GB, 32 GB, 64 GB |
| RAM memory | 1 GB | 3 GB, 4 GB |
| Memory cards | microSD, microSDHC, microSDXC up to 64 GBBuy memory card | microSD, microSDHC, microSDXC up to 128 GBBuy memory card |
| Operating system | Android 8.1 Oreo Go | Android 6.0 Marshmallow |
| Interface | - | MIUI 8 |
| Processor | MediaTek MT6580 | Qualcomm Snapdragon 625 8953 |
| Processor clock | 1300 MHz | 2000 MHz |
| GPU | ARM Mali-400 MP2 500 MHz | Adreno 506 |
| Touchscreen | | |
| DualSIM | | |
| SIM cards standard | DualSIM(nanoSIM, nanoSIM) | DualSIM(microSIM, nanoSIM) |
| DualSIM mode | dual standby |  |
| Hybrid DualSIM | nanoSIM, microSD | microSIM, microSD |
| Announced | 3Q 2018 | 1Q 2017 |
| Other names | - | Redmi Note 4X Hatsune Miku |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | 900 2100 | 850 900 1900 2100 |
| LTE standard | | FDD LTE: 2600, 2100, 1800, 850 TDD LTE: 2600, 2500, 2300, 1900 |
| CDMA | | 850 1900 |
| Standard TD-SCDMA | | 1900 2000 |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Photo sensor model | | Sony IMX258 |
| Photo matrix | 5 Mpx | 13 Mpx |
| Resolution | | 4208x3120 px |
| Optical zoom | | |
| Flash | LED | 2x LED |
| Dual-colour LED flash | | 1+1 |
| Video resolution | | 1920x1080 px |
| Video formats | MPEG4, H.264, VP9, WMV9, 3GPP | MPEG4, H.263, H.264, H.265 - 30 fps |
| Additional | f/2.2 | AF, f/2.0 |
| Second camera | | |
| Photo matrix | 5 Mpx | nd |
| Optical zoom | | nd |
| Flash | LED | nd |
| Dual-colour LED flash | | nd |
| Video formats | MPEG4, H.264, VP9, WMV9, 3GPP | nd |
| Additional | - | nd |
CAMERAS - FRONT
| First camera | | |
| Photo sensor model | | Samsung S5K5E8 |
| Photo matrix | 2 Mpx | 5 Mpx |
| Resolution | | 2592x1944 px |
| Optical zoom | | |
| Flash | | |
| Dual-colour LED flash | | |
| Video resolution | | 1920x1080 px |
| Video formats | MPEG4, H.264, VP9, WMV9, 3GPP | MPEG4, H.263, H.264, H.265 - 30 fps |
| Additional | f/2.2 | 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 | | |
| LTE UP | | |
| WIMAX+ | | |
| GPRS | | |
| EDGE | | |
| Bluetooth | v4.0 | v4.2 |
| A2DP Profile | | |
| HDMI | | |
| WiFi | v802.11 b/g/n | v802.11 a/b/g/n |
| WiFi frequencies | 2,4 GHz | 2,4 GHz; 5 GHz |
| WiFi Direct | | |
| WiFi Display | | |
| DLNA | | |
| Miracast | | |
| WiFi hotspot | | |
| IrDA | | |
| USB | v2.0 | v2.0 |
| GPS | | |
| A-GPS | | |
| GLONASS | | |
| Beidou | | |
| Galileo | | |
| NFC | | |
COMMUNICATION AND MESSAGING
| Call waiting | | |
| Conferency | | |
| Call forwarding | | |
| Push To Talk | | |
| Instant Messenger | | |
| SMS | | |
| EMS | | |
| MMS | | |
| Dictionary | XT9 | XT9 |
| 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 | AAC, ARM, AWB, FLAC, WAV | AAC, AAC+, AMR, APE, FLAC, WAV, eAAC+ |
| Polyphony | | |
| Video ringtone | | |
| Ring composer | | |
| 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 | | |