New Release Updated: Mar 2026

Lg K40

$158 (Expected Price)

Reviewed by the MobGadgets Tech Team

We analyze specs, compare pricing, and aggregate real-world data to bring you unbiased mobile reviews. Learn how we test.

Display 5.7" AMOLED

Processor Helio P22

Battery 3000mAh

RAM & Storage 32GB storage, microSDXC

Full Specs

Should you buy the Lg K40?

Reasons to Buy

Massive The LG K40 is equipped with a non-removable Li-Ion 3000 mAh battery, which offers an average battery life for a device in its price range. While it may not have the largest battery capacity, it is sufficient for everyday usage. The device does not support wireless charging, but it does feature fast charging technology, allowing you to quickly recharge the battery when needed. The battery optimization features on the LG K40 help to improve power efficiency and extend battery life. Users can also take advantage of the battery saver mode to further conserve power. In terms of battery performance, the LG K40 offers decent screen-on time and standby time. The charging speed and efficiency are satisfactory, ensuring that you can quickly juice up your device without any major issues. Overall, the battery of the LG K40 provides a reliable backup and performs well for day-to-day usage. battery life
Large 6.7" display for media
Excellent value at $158

Reasons to Avoid

May be bulky due to large battery
Average camera performance in low light

Full Specifications

Also known as LG K12+, LG K12 Plus, LG X4 (2019)
Versions: LMX420EMW

Network Technology: GSM / HSPA / LTE

Launch Announced: 2019, February. Released 2019, April Status: Discontinued

Body Dimensions: 153 x 71.9 x 8.3 mm (6.02 x 2.83 x 0.33 in) Weight: 144 g (5.08 oz) Build: Glass front, plastic back, plastic frame SIM: Nano-SIM
Nano-SIM + Nano-SIM - : MIL-STD-810G compliant*
*does not guarantee ruggedness or use in extreme conditions

Display Type: IPS LCD Size: 5.7 inches, 83.8 cm² (~76.2% screen-to-body ratio) Resolution: 720 x 1440 pixels, 18:9 ratio (~282 ppi density)

Platform OS: Android 8.1 (Oreo), LG UX 7 Chipset: Mediatek MT6762 Helio P22 (12 nm) CPU: Octa-core 2.0 GHz Cortex-A53 GPU: PowerVR GE8320

Memory Card slot - microSDXC (dedicated slot) Internal: 32GB 2GB RAM, 32GB 3GB RAM
- : eMMC 5.1

Main Camera Single: 16 MP, f/2.0, 1/3.1", 1.0µm, PDAF Features: LED flash, panorama, HDR Video: 1080p@30fps

Selfie camera Single: 8 MP, f/2.0 Features: LED flash Video: 1080p@30fps

Sound Loudspeaker : Yes 3.5mm jack : Yes

Comms WLAN: Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA Bluetooth: 5.0, A2DP, LE Positioning: GPS, GLONASS NFC: Yes (market/region dependent) Radio: No USB: microUSB 2.0, OTG

Features Sensors: Fingerprint (rear-mounted), accelerometer, proximity, compass

Battery Type: Li-Ion 3000 mAh, non-removable

Misc Colors: Black, New Moroccan Blue, New Platinum Gray Models: LMX420, LMX420EMW, LM-X420 Price: About 140 EUR

Frequently Asked Questions

With its Dimensity 6300 chipset and 6GB of RAM, it handles everyday tasks and moderate gaming efficiently, though extremely graphic-intensive games may require lower settings.

Yes, to complement its massive The LG K40 is equipped with a non-removable Li-Ion 3000 mAh battery, which offers an average battery life for a device in its price range. While it may not have the largest battery capacity, it is sufficient for everyday usage. The device does not support wireless charging, but it does feature fast charging technology, allowing you to quickly recharge the battery when needed. The battery optimization features on the LG K40 help to improve power efficiency and extend battery life. Users can also take advantage of the battery saver mode to further conserve power. In terms of battery performance, the LG K40 offers decent screen-on time and standby time. The charging speed and efficiency are satisfactory, ensuring that you can quickly juice up your device without any major issues. Overall, the battery of the LG K40 provides a reliable backup and performs well for day-to-day usage. battery, it features standard fast charging capabilities to get you back up and running quickly.