| Physical features | LG K7 (4G K330) | LG K40 (X420EM) |
| Model | K7 (4G K330) | K40 (X420EM) |
| Other model names | T-Mobile LG K7 K330 LTE, LG K330, LG M1 | LG K40 LMX420EM NFC Single-sim, LM-X420EM, LG-LMX420EM |
| Country or region available | 
USA | 
(Europe) |
| Brand | LG | LG |
| Release date | January, 2016 | March, 2019 |
| Depth | 8.9 millimeters (0.35 inches) | 8.3 millimeters (0.33 inches) |
| Size (width x height) | 72.39 x 143.51 millimeters (2.85 x 5.65 in) | 71.9 x 153 millimeters (2.83 x 6.02 in) |
| Weight | 138 grams (4.83 ounces) | 145 grams (5.08 ounces) |
| Qwerty physical keyboard | Not supported | Not supported |
| Antenna | Internal antenna | Internal antenna |
| Build, materials | feature not registered | Plastic body, glass front |
| Protection against water and others | Not supported | MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. |
| System (OS) | LG K7 (4G K330) | LG K40 (X420EM) |
| Operating system | Android 5.1.1 Lollipop | Android 8.1 Oreo |
| Firmware update | feature not registered | feature not registered |
| Hardware | LG K7 (4G K330) | LG K40 (X420EM) |
| Chipset | 32bit - Qualcomm Snapdragon 210 MSM8909 (28nm) | 64bit - MediaTek MT6762 Helio P22 (12nm) |
| CPU processor | 1.1Ghz Quad-Core ARM Cortex-A7 | Octa-Core, 2 processors:
2Ghz Quad-Core ARM Cortex-A53
1.5Ghz Quad-Core ARM Cortex-A53 |
| GPU graphical controller | Qualcomm Adreno 304 | PowerVR GE8320 650Mhz |
| RAM memory | 1.5GB LPDDR3 | 2GB LPDDR3 |
| Internal storage | 8GB (4GB available) | 32GB (20GB available)
eMMC 5.1 |
| External storage | Until 32GB microSD, microSDHC
(dedicated slot) | Until 1TB microSD, microSDXC
(dedicated slot) |
| Display | LG K7 (4G K330) | LG K40 (X420EM) |
| Display type | TFT IPS LCD | TFT IPS LCD |
| Screen size | 5" inches | 5.7" inches |
| Screen-to-body ratio | ~66.3% (screen-to-body ratio) | ~76.2% (screen-to-body ratio) |
| Display resolution | 480x854 pixels | 720x1440 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 196 PPI | 282 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Not supported | Not supported |
| Display features | feature not registered | feature not registered |
| Mobile networks | LG K7 (4G K330) | LG K40 (X420EM) |
| Dual-SIM | Not supported | Not supported |
| SIM card | 1 slot (Single-SIM)
nano-SIM (4FF) | 1 slot (Single-SIM)
nano-SIM (4FF) |
| Maximum download/upload | 150/50 Mbps | 300/50 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 | UMTS 850/1700/1900 | UMTS 850/900/1900/2100 |
| Primary 4G network | LTE Cat4 700/1700/1900/2100 (Bands 2,4,12) | LTE Cat6 (Bands 1, 3, 5, 7, 8, 20)
TD-LTE (Bands 38) |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A |
| Secondary 2G network | Not supported | Not supported |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | Not supported | Not supported |
| Calling | LG K7 (4G K330) | LG K40 (X420EM) |
| 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 | LG K7 (4G K330) | LG K40 (X420EM) |
| Back camera (main camera) | 5 megapixels | 16 megapixels |
| Main camera resolution | 2560x1920 pixels | 4608x3456 pixels |
| Video recording (primary) | HD (1280x720) 30 fps | Full HD (1920x1080) 30 fps |
| Flash | LED flash | LED flash on both cameras |
| Focal aperture | feature not registered | f/2.0 (aperture) |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | 1/3" inches |
| Pixel size | feature not registered | 1µm pixel |
| Autofocus | Autofocus | PDAF: phase detection autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | feature not registered | 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 only main camera | HDR photo on both cameras |
| 2ª camera | LG K7 (4G K330) | LG K40 (X420EM) |
| Front camera (secondary) | 5 megapixels | 8 megapixels |
| Front camera resolution | 2560x1920 pixels | 3264x2448 pixels |
| Video recording (secondary) | HD (1280x720) | Full HD (1920x1080) |
| Front flash | Not supported | LED |
| Focal aperture | feature not registered | f/2.0 (aperture) |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | feature not registered | feature not registered |
| Multimedia | LG K7 (4G K330) | LG K40 (X420EM) |
| Radio | FM | Not supported |
| TV | Not supported | Not supported |
| Video formats | MP4, H.265, H.264, H.263, XviD | MP4, H.264, H.263, XviD, MKV |
| Audio formats | MP3, WAV, eAAC+, FLAC | MP3, WAV, WMA, eAAC+, FLAC |
| Connectivity | LG K7 (4G K330) | LG K40 (X420EM) |
| USB | MicroUSB 2.0 | MicroUSB 2.0, USB OTG On-The-Go |
| TV output | Not supported | Not supported |
| Audio output | 3.5mm jack | 3.5mm jack |
| Bluetooth | 4.1 + A2DP | 5.0 + A2DP/LE |
| WiFi | 802.11 b/g/n (2.4Ghz) | 802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO |
| DLNA | Not supported | Supported |
| NFC | Not supported | Supported |
| GPS | A-GPS, GeoTagging | A-GPS, GeoTagging |
| Infrared port | Not supported | Not supported |
| Other functions | LG K7 (4G K330) | LG K40 (X420EM) |
| Active noise cancellation | Not supported | Supported |
| Vibrating alert | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 | HTML, XHTML, HTML5 |
| Sensors | Accelerometer
Proximity sensor
Ambient Light sensor
| Accelerometer
Proximity sensor
Ambient Light sensor
Fingerprint sensor (rear-mounted)
|
| Other features | - Colors: Black, White, Gold, Titan
- 2.5D Arc Glass
- Knock Code, Knock On
- Take still shots while recording video
- WiFi direct, hotspot | - Colors: Black, Moroccan Blue, Platinum Gray
- 18:9 ratio FullVision display
- LED notification
- DTS-X Surround sound
- WiFi direct, hotspot |
| Power supply | LG K7 (4G K330) | LG K40 (X420EM) |
| Battery | Li-Ion: Lithium-Ion (Removable) | Li-Ion: Lithium-Ion (Non removable) |
| Battery capacity | 2045 mAh | 3000 mAh |
| Charger, watts | Standard charging | Standard charging |
| Talk time autonomy | 660 minutes | 11 hours | 0.5 day | 480 minutes | 8 hours | 0.3 day |
| Standby | 18720 minutes | 312 hours | 13 days | 6000 minutes | 100 hours | 4.2 days |
| Radiation rate | LG K7 (4G K330) | LG K40 (X420EM) |
| 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 |