Nubia X vs Ulefone Armor 21
| Type | Touch | Touch |
| Waterproofness & dust-resistance |  | IP68, IP69K |
| Dimensions | 154.10 x 73.30 x 8.40 mm | 176.00 x 81.60 x 18.10 mm |
| Weight | 181.00 g | 400.00 g |
| Display size | 6.26" | 6.58" |
| Display | Color / IPS TFT 16M colors 1080 x 2280 px (6.26") 403 ppi | Color / IPS TFT 16M colors 120 Hz 1080 x 2408 px (6.58") 401 ppi |
| Display protection | Corning Gorilla Glass Buy screen protector
 |  |
| Additional display | Color / OLED 16M colors 720 x 1520 px (5.10") | |
| Protection of the secondary display | Corning Gorilla Glass | |
| Talk time (max.) | | 3G: 2340 min. (39.0 h) |
| Stand-by (max.) | | 3G: 522 h. (21.8 days) |
| Playback time (max.) | nd | Audio: 30 h (1.3 days) Video: 15 h (0.6 days) |
| Standard battery | Li-Po 3800 mAhBuy powerbank
| Li-Po 9600 mAhBuy powerbank
|
| Quick battery charging | Quick Charge 3.0 |  |
| Wireless battery charging | | |
| Internal memory | 64 GB, 128 GB, 256 GB | 256 GB |
| RAM memory | 6 GB, 8 GB | 8 GB |
| Memory cards | | microSD, microSDHC, microSDXC up to 2000 GBBuy memory card |
| Operating system | Android 8.1 Oreo | Android 13 |
| Interface | nubia UI 6.0.2 | - |
| Processor | Qualcomm Snapdragon 845 | MediaTek Helio G99 MT6789 |
| Processor clock | 2650 MHz | 2200 MHz |
| GPU | Adreno 630 | ARM Mali-G57 MC2 |
| Touchscreen | | |
| DualSIM | | |
| SIM cards standard | DualSIM(nanoSIM, nanoSIM) | DualSIM(nanoSIM, nanoSIM) |
| DualSIM mode | dual standby | dual standby |
| Hybrid DualSIM | | |
| Announced | 4Q 2018 | 2Q 2023 |
| Other names | - | - |
| 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, 1800, 1700, 900, 850, 800, 700 TDD LTE: 2600, 2500, 2300, 1900 | FDD LTE: 2600, 2100, 1900, 1800, 1700, 900, 850, 800, 700 TDD LTE: 2600, 2500, 2300, 2100, 1900 |
| Standard 5G | | |
| CDMA | 850 CDMA2000 1xEV-DO | |
| Standard TD-SCDMA | 1900 2000 | |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Camera type | | Standard |
| Photo sensor model | | Sony IMX686 |
| Photo matrix | 16 Mpx | 64 Mpx |
| Sensor size | | 1/1,7 |
| Pixel size | | 0,8 µm |
| Resolution | | 9216x6912 px |
| Optical zoom | | |
| Number of lenses | | 6 |
| Field of view | | 85 ° |
| Flash | 3x LED | LED |
| Dual-colour LED flash | 2+1 | |
| Video resolution | | 1920x1440 px |
| Video formats | H.263, H.264, H.265, MPEG4 - 30 fps | H.264, H.265, MPEG4 - 30 fps |
| Additional | AF, OIS, f/1.8 | AF, f/1.9 |
| Second camera | | |
| Photo sensor model | | OmniVision OV24A1B |
| Photo matrix | 24 Mpx | 24 Mpx |
| Sensor size | | 1/2,83 |
| Pixel size | | 0,9 µm |
| Resolution | | 5664x4248 px |
| Optical zoom | | |
| Field of view | | 78 ° |
| Flash | 3x LED | LED |
| Dual-colour LED flash | 2+1 | |
| Video formats | H.263, H.264, H.265, MPEG4 - 30 fps | H.264, H.265, MPEG4 - 30 fps |
| Additional | AF, OIS, f/1.7 | FF, f/1.8 |
CAMERAS - FRONT
| First camera | | |
| Camera type | nd | Portrait |
| Photo sensor model | nd | Sony IMX481 |
| Photo matrix | nd | 16 Mpx |
| Sensor size | nd | 1/3,09 |
| Pixel size | nd | 1 µm |
| Resolution | nd | 4656x3496 px |
| Optical zoom | nd | |
| Number of lenses | nd | 5 |
| Field of view | nd | 76 ° |
| Flash | nd | |
| Dual-colour LED flash | nd | |
| Video resolution | nd | 1920x1440 px |
| Video formats | nd | H.264, H.265, MPEG4 - 30 fps |
| Additional | nd | 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 | 42.00 Mbit/s | 42.20 Mbit/s |
| HSUPA | 5.76 Mbit/s | 5.76 Mbit/s |
| HSPA | | |
| HSPA+ | | |
| LTE DL | 1174.00 Mbit/s | |
| LTE UP | - | |
| WIMAX+ | | |
| GPRS | | |
| EDGE | | |
| Bluetooth | v5.0 | v5.2 |
| A2DP Profile | | |
| HDMI | | |
| WiFi | v802.11 b/g/n | v802.11 a/b/g/n/ac |
| WiFi frequencies | 2,4 GHz; 5 GHz | 2,4 GHz; 5 GHz |
| WiFi Direct | | |
| WiFi Display | | |
| DLNA | | |
| Miracast | | |
| WiFi hotspot | | |
| IrDA | | |
| USB | v2.0 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, APE, DTS, FLAC, IMY, M4A, MID, MKA, OGG, QCP, WAV, WMA, WMV | AAC, AAC+, AMR, FLAC, MID, MKA, OGG, WAV, 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 | | |