LG K40 vs LG X cam
| Type | Touch | Touch |
| Dimensions | 153.00 x 71.90 x 8.30 mm | 147.50 x 73.60 x 6.90 mm |
| Weight | 144.00 g | 121.00 g |
| Display size | 5.70" | 5.20" |
| Display | Color / IPS TFT 16M colors 720 x 1440 px (5.70") 295 ppi | Color / IPS TFT 16M colors 1080 x 1920 px (5.20") 424 ppi |
| Display protection |   | |
| Additional display | | |
| Protection of the secondary display | | |
| Talk time (max.) |  | 2G: 340 min. (5.7 h) 3G: 410 min. (6.8 h) |
| Stand-by (max.) | | 2G: 260 h. (10.8 days) 3G: 260 h. (10.8 days) 4G: 270 h. (11.3 days) |
| Standard battery | Li-Ion 3000 mAhBuy powerbank
| Li-Po 2520 mAhBuy powerbank
|
| Quick battery charging | | |
| Wireless battery charging | | |
| Internal memory | 32 GB | 16 GB |
| End-user memory | 20.2 GB | |
| RAM memory | 2 GB, 3 GB | 2 GB |
| Memory cards |  microSD, microSDHC, microSDXC up to 2000 GBBuy memory card | microSD, microSDHC, microSDXC up to 2000 GBBuy memory card |
| Operating system | Android 8.1 Oreo | Android 6.0.1 Marshmallow |
| Processor | MediaTek Helio P22 MT6762 | MediaTek MT6753 |
| Processor clock | 2000 MHz | 1140 MHz |
| GPU | PowerVR GE8320 @650 MHz | ARM Mali-T720 @450 MHz |
| Touchscreen | | |
| SAR (10g) | 1,597 W/kg | 0,562 W/kg |
| DualSIM | | |
| SIM cards standard | SingleSIM(nanoSIM) | SingleSIM(nanoSIM) |
| Announced | 1Q 2019 | 1Q 2016 |
| Other names | X420EM; LM-X420EM | K580; K580TR; K580i; K580F; K580AR |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | 850 900 1900 2100 | 850 900 1900 2100 |
| LTE standard | FDD LTE: 2600, 2100, 1900, 1800, 900, 850, 800, 700 | FDD LTE: 2600, 2100, 1800, 1700, 900, 800, 700 TDD LTE: 2600, 2300, 1900 |
| CDMA | | |
| Standard TD-SCDMA | | 1900 2000 |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Photo matrix | 16 Mpx | 13 Mpx |
| Resolution | | 4160x3120 px |
| Optical zoom | | |
| Digital zoom | 4x | 8x |
| Flash | 2x LED | LED |
| Dual-colour LED flash | | |
| Video resolution | 1920x1080 px | 1920x1080 px |
| Video formats | H.263, H.264, MPEG4 - 30 fps | H.263, H.264, MPEG4 - 30 fps |
| Additional | AF, f/2.0 | AF, f/2.0 |
| Second camera | | |
| Photo matrix | nd | 5 Mpx |
| Resolution | nd | 2592x1944 px |
| Optical zoom | nd | |
| Flash | nd | LED |
| Dual-colour LED flash | nd | |
| Video formats | nd | H.263, H.264, MPEG4 - 30 fps |
| Additional | nd | f/2.4 |
CAMERAS - FRONT
| First camera | | |
| Photo matrix | 8 Mpx | 8 Mpx |
| Resolution | | 3264x2448 px |
| Optical zoom | | |
| Flash | LED | |
| Dual-colour LED flash | | |
| Video formats | H.263, H.264, MPEG4 - 30 fps | H.263, H.264, MPEG4 - 30 fps |
| Additional | FF, f/2.0 | FF, f/2.4 |
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 | - | - |
| LTE UP | 51.00 Mbit/s | 51.00 Mbit/s |
| WIMAX+ | | |
| GPRS | | class 12 |
| EDGE | | class 12 |
| Bluetooth | v4.2 | v4.2 |
| A2DP Profile | | |
| HDMI | | |
| WiFi | v802.11 a/b/g/n/ac | v802.11 b/g/n |
| WiFi frequencies | 2,4 GHz; 5 GHz | 2,4 GHz |
| WiFi Direct | | |
| WiFi Display | | |
| DLNA | | |
| Miracast | | |
| WiFi hotspot | | |
| IrDA | | |
| USB | v2.0 | v2.0 |
| GPS | | |
| A-GPS | | |
| GLONASS | | |
| Beidou | | |
| NFC | | |
COMMUNICATION AND MESSAGING
| Call waiting | | |
| Conferency | | |
| Call forwarding | | |
| Push To Talk | | |
| Instant Messenger | | |
| SMS | | |
| EMS | | |
| MMS | | |
| Dictionary | T9 | 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, AAC+, AMR, APE, DSD, FLAC, OGG, WAV, WMA, eAAC+ | AAC, AAC+, AMR, FLAC, OGG, WAV, WMA, 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 | | |