In depth comparison and review of Xiaomi Redmi Note 9 and LG K40. Compare sizes, cameras, batteries, memory, and other important specifications and features to easily choose the right phone for you. Our goal is to help you uncover differences between the products and find the phone that will best fit your needs.
| DESIGN AND DIMENSIONS | Xiaomi Redmi Note 9 | LG K40 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | - | LM-X420EMW | |
| Form Factor | Touch | Touch | |
| Height | 162.3 mm | 153 mm | Xiaomi Redmi Note 9 has greater height than LG K40. |
| Width | 77.2 mm | 71.9 mm | Xiaomi Redmi Note 9 has greater width than LG K40. |
| Depth | 8.9 mm | 8.3 mm | LG K40 is narrower than Xiaomi Redmi Note 9. |
| Weight | 199 g | 145 g | LG K40 is lighter than Xiaomi Redmi Note 9. |
| Body Colour | Forest green | New Aurora Black | Moroccan blue | |
| Protection | Splashproof | - | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 2.262 W/kg (limb), 1.138 W/kg (body), 0.795 W/kg (head) | 1.597 W/kg (body), 0.518 W/kg (head) | |
| Integrated Components | Ultra-linear speaker | FM radio | |
| Connector Type | USB Type-C - 24 pin USB-C Headset jack - mini-phone 3.5mm |
Headset jack - mini-phone 3.5mm Micro-USB - 5 pin Micro-USB Type B |
|
| SIM Card Type (Size) | Nano SIM | - | |
| SIM Card Qty | Dual-SIM | Dual-SIM | |
| SIM Card Configuration Details | Nano SIM + nano SIM/microSD | - |
| DISPLAY | Xiaomi Redmi Note 9 | LG K40 |
|---|
| Display Type | - | LCD display | |
|---|---|---|---|
| Display Technology | - | IPS | |
| Screen Size (Display Size) | 6.53" | 5.7" | Xiaomi Redmi Note 9 has larger screen size than LG K40. |
| Screen Resolution (Display Resolution) | 2340 x 1080 pixels | 1440 x 720 pixels | Xiaomi Redmi Note 9 has better screen resolution than LG K40. |
| Display Format | Full HD+ | HD | |
| Pixel Density | - | 282 ppi | |
| Aspect Ratio | 19.5:9 | 18:9 | |
| Max Brightness | 450 cd/m² | - | |
| Contrast Ratio | 1500:1 | - | |
| Display Features | Reading mode 2.0, Dot Display, Full Screen gestures | Curved glass, FullVision display | |
| Display Protection (Screen Protector) | Corning Gorilla Glass 5 (scratch resistant glass) | - |
| PROCESSOR | Xiaomi Redmi Note 9 | LG K40 |
|---|
| Processor Type (CPU) | MediaTek Helio G85 | MediaTek | |
|---|---|---|---|
| Processor Number | - | MT6762 | |
| Clock Speed | 2 GHz | 2 GHz | Both phones have the same clock speed. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| 64-bit Architecture | - | Yes | LG K40 has 64-bit architecture. |
| Graphics System (GPU) | ARM G52 MC2 | PowerVR GE8320 |
| MEMORY | Xiaomi Redmi Note 9 | LG K40 |
|---|
| RAM | 3 GB | 2 GB | Xiaomi Redmi Note 9 has more RAM than LG K40. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 64 GB | 32 GB | Xiaomi Redmi Note 9 has more internal memory than LG K40. |
| User Memory | - | 20.2 GB | |
| Supported Flash Memory Cards (Expandable Memory) | microSD | microSDHC, microSDXC - up to 2 TB |
| CAMERA | Xiaomi Redmi Note 9 | LG K40 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 4 | 1 | |
|---|---|---|---|
| Sensor Resolution | 48 Megapixel | 16 Megapixel | Xiaomi Redmi Note 9 has better camera resolution than LG K40. |
| Sensor Size | 1/2" | 1/3" | LG K40 has better camera sensor size than Xiaomi Redmi Note 9. |
| Lens Aperture | F/1.79 | F/2.0 | Xiaomi Redmi Note 9 has better lens aperture than Xiaomi Redmi Note 9. |
| Lens Construction | 6-element | - | |
| Field of View (FoV) | 79.4 degree(s) | - | |
| Pixel Size | 0.8 μm | 1 μm | LG K40 has larger camera pixel size than Xiaomi Redmi Note 9. |
| Focus Adjustment | Automatic | Automatic | |
| Special Effects | HDR, Kaleidoscope | - | |
| Camera Modes | Burst mode, Panorama, night mode, Smart ultra-wide angle mode, Photo timer, Custom watermark, Documents, Beautify, Levelling, Cinematic portraits | - | |
| Face Recognition (Face ID) | Face recognition | - | Xiaomi Redmi Note 9 has face detection. |
| Light Source | Flash | LED flash | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps, Slo-mo video 1280 x 720 (720p) at 120 fps | - | |
| Camera Features (Functions) | 4-in-1 Super Pixel, AI scene detection, Portrait mode with background blurring, Ultra wide-angle edge distortion correction, Steady handheld night photography, full screen frame, AI watermark | Phase Detect Auto-Focus (PDAF), GIF Creation, 8 different scenes |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 8 Megapixel | - | |
|---|---|---|---|
| Sensor Size (2nd Camera) | 1/4" | - | |
| Lens Type (2nd Camera) | Ultra wide-angle lens | - | |
| Lens Aperture (2nd Camera) | F/2.2 | - | |
| Lens Element Qty (2nd Camera) | 5-element | - | |
| Field of View (2nd Camera) | 118 degree(s) | - | |
| Pixel Size (2nd Camera) | 1.2 μm | - | |
| Camera Features (2nd Camera) | 5-piece lens | - |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 2 Megapixel | - | |
|---|---|---|---|
| Lens Aperture (3rd Camera) | F/2.4 | - | |
| Pixel Size (3rd Camera) | 1.75 μm | - | |
| Camera Functions (3rd Camera) | Macro camera | - | |
| Camera Features (3rd Camera) | AF (2cm-10cm) | - |
| FOURTH CAMERA |
|---|
| Sensor Resolution (4th Camera) | 2 Megapixel | - | |
|---|---|---|---|
| Sensor Size (4th Camera) | 1/5" | - | |
| Lens Aperture (4th Camera) | F/2.4 | - | |
| Lens Element Qty (4th Camera) | 3-element | - | |
| Pixel Size (4th Camera) | 1.75 μm | - | |
| Camera Functions (4th Camera) | Depth camera | - |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 13 Megapixel | 8 Megapixel | Xiaomi Redmi Note 9 has better front camera resolution than LG K40. |
| Sensor Size (Front) | 1/3.06" | 1/4" | LG K40 has better front camera sensor size than Xiaomi Redmi Note 9. |
| Lens Aperture (Front) | F/2.25 | F/2.0 | LG K40 has better front lens aperture than Xiaomi Redmi Note 9. |
| Lens Element Qty (Front) | 5-element | - | |
| Field of View (Front) | 74 degree(s) | - | |
| Pixel Size (Front) | 1.12 μm | 1.12 μm | Both phones have the same front camera pixel size. |
| Special Effects (Front) | HDR | - | |
| Camera Modes (Front) | Panoramic selfies, AI portrait mode, AI Beautify | Portrait mode | |
| Face Recognition (Face ID) | Face recognition | - | Xiaomi Redmi Note 9 has face detection. |
| Light Source (Front) | Display flash | LED flash | |
| Camera Features (Front) | Palm shutter, AI silhouette detection | - |
| BATTERY AND CHARGING | Xiaomi Redmi Note 9 | LG K40 |
|---|
| Battery Capacity (Battery Size) | 5020 mAh | 3000 mAh | Xiaomi Redmi Note 9 has larger battery capacity than LG K40. |
|---|---|---|---|
| Standby Time | - | 100 hours | |
| Talk Time | 1980 minutes | 480 minutes | Xiaomi Redmi Note 9 has longer battery life when making calls than LG K40. |
| Run Time Details | Talk: up to 1980 min Gaming: up to 16 hrs Playback (Music): up to 147 hrs Navigation: up to 16 hrs |
Talk: up to 480 min Standby: up to 100 hrs |
|
| Battery Technology | Lithium polymer | Lithium Ion |
| CELLULAR | Xiaomi Redmi Note 9 | LG K40 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | - | Android 8.1 Oreo | |
| Intelligent Assistant | - | Google Assistant | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou, Galileo | GPS |
| COMMUNICATIONS | Xiaomi Redmi Note 9 | LG K40 |
|---|
| Data Transmission | VoLTE, FDD-LTE, TDD-LTE | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1900 GSM, 2100 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 3G UMTS Band | Band 1, Band 2, Band 4, Band 5, Band 8 | - | |
| 3G UMTS Frequency | 2100, 1900, 1700, 850, 900 | - | |
| 4G LTE Band | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40, Band 41 | Band 1, Band 3, Band 7, Band 8, Band 20, Band 38 | |
| 4G LTE Frequency | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500 | FDD 2100, FDD 1800+, FDD 2600, FDD 900, FDD 800 DD, TDD 2600 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac | IEEE 802.11a/b/g/n/ac | |
| Bluetooth | Bluetooth 5.0 | Bluetooth 5.0 LE | |
| NFC | - | Yes | LG K40 has NFC reader for mobile payments. |
| Messaging Services | - | SMS, MMS |
| MEDIA | Xiaomi Redmi Note 9 | LG K40 |
|---|
| Supported Digital Audio Standards | WAV, AAC, AMR, MP3, FLAC, APE (Monkey's Audio) | WMA, AAC, PCM, MP3, FLAC, AAC +, eAAC+, OPUS, AMR-WB, AMR-NB, Vorbis | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, XviD, M4V, MP4 | - | |
| Sound Enhancements | - | DTS: X 3D Premium Sound | |
| Audio Amplifier | Smart PA | - |
| FEATURES | Xiaomi Redmi Note 9 | LG K40 |
|---|
| Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | |
|---|---|---|---|
| Sensors | Accelerometer, ambient light sensor, proximity sensor, digital compass, gyro sensor, infrared (IR) sensor | Ambient light sensor, proximity sensor | |
| Security Devices | Face recognition, fingerprint reader | Face recognition, fingerprint reader | |
| Additional Phone Features | Infrared remote control, HyperEngine technology | Google Lens, Google Assistant Key, AI Cam |
| OTHERS | Xiaomi Redmi Note 9 | LG K40 |
|---|
| Included Accessories | Protective cover, power adapter, SIM card removal tool, USB-C cable | Power adapter | |
|---|---|---|---|
| Compliant Standards | TUV Rheinland Low Blue Light Certification | MIL-STD 810G |
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