Side by side comparison and review of Xiaomi Redmi 9 and LG K51S. Compare sizes, cameras, batteries, memory capacities and other key specifications and features to simplify the choice of your perfect phone. Our goal is to make it easier for you to decide on the phone that will best meet your expectations by revealing the main differences between the products.
| DESIGN AND DIMENSIONS | Xiaomi Redmi 9 | LG K51S |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | - | LM-K510EMW | |
| Form Factor | Touch | Touch | |
| Height | 163.32 mm | 165.2 mm | LG K51S has greater height than Xiaomi Redmi 9. |
| Width | 77.01 mm | 76.7 mm | Xiaomi Redmi 9 has greater width than LG K51S. |
| Depth | 9.1 mm | 8.26 mm | LG K51S is narrower than Xiaomi Redmi 9. |
| Weight | 198 g | 194 g | LG K51S is lighter than Xiaomi Redmi 9. |
| Body Colour | Carbon grey | Pink | Titan | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 1.065 W/kg (body), 0.789 W/kg (head), 2.309 W/kg (limb) | 1.335 W/kg (body), 0.501 W/kg (head) | |
| Integrated Components | Ultra-linear speaker | - | |
| Connector Type | USB Type-C - 24 pin USB-C Headset jack - mini-phone 3.5mm |
Headset jack - mini-phone 3.5mm USB Type-C - 24 pin USB-C |
|
| SIM Card Type (Size) | Nano SIM | Nano SIM | |
| SIM Card Qty | Dual-SIM | Dual-SIM |
| DISPLAY | Xiaomi Redmi 9 | LG K51S |
|---|
| Display Type | - | LCD display | |
|---|---|---|---|
| Display Technology | - | IPS | |
| Screen Size (Display Size) | 6.53" | 6.55" | LG K51S has larger screen size than Xiaomi Redmi 9. |
| Screen Resolution (Display Resolution) | 2340 x 1080 pixels | 1600 x 720 pixels | Xiaomi Redmi 9 has better screen resolution than LG K51S. |
| Display Format | Full HD+ | HD+ | |
| Pixel Density | 394 ppi | 268 ppi | Xiaomi Redmi 9 has better pixel density than LG K51S. |
| Aspect Ratio | 19.5:9 | 20:9 | |
| Max Brightness | 400 cd/m² | 400 cd/m² | Both phones have the same display brightness |
| Contrast Ratio | 1500:1 | - | |
| Display Enhancement Technology | Sunlight mode | - | |
| Display Features | Colour temperature adjustment, Dot Drop display, Reading mode 2.0 | Reading mode, FullVision display, night mode, hole in display | |
| Display Protection (Screen Protector) | Corning Gorilla Glass 3 (scratch resistant glass) | Tempered glass |
| PROCESSOR | Xiaomi Redmi 9 | LG K51S |
|---|
| Processor Type (CPU) | MediaTek Helio G80 | MediaTek | |
|---|---|---|---|
| Processor Number | - | MT6765 | |
| Clock Speed | 2 GHz | 2.3 GHz | LG K51S has higher clock speed than Xiaomi Redmi 9. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| 64-bit Architecture | Yes | Yes | Both phones have 64-bit architecture. |
| Graphics System (GPU) | Mali-G52 MC2 | IMG PowerVR GE8320 |
| MEMORY | Xiaomi Redmi 9 | LG K51S |
|---|
| RAM | LPDDR4X SDRAM - 4 GB | 3 GB | Xiaomi Redmi 9 has more RAM than LG K51S. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 64 GB | 64 GB | Both phones have the same internal memory capacity. |
| User Memory | - | 50.2 GB | |
| Supported Flash Memory Cards (Expandable Memory) | microSD | microSDHC, microSDXC - up to 2 TB |
| CAMERA | Xiaomi Redmi 9 | LG K51S |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 4 | 4 | |
|---|---|---|---|
| Sensor Resolution | 13 Megapixel | 32 Megapixel | LG K51S has better camera resolution than Xiaomi Redmi 9. |
| Lens Type | Wide-angle lens | - | |
| Lens Aperture | F/2.2 | F/1.8 | LG K51S has better lens aperture than Xiaomi Redmi 9. |
| Field of View (FoV) | 75.2 degree(s) | 76.3 degree(s) | LG K51S has larger lens field of view than Xiaomi Redmi 9. |
| Focus Adjustment | Automatic | Automatic | |
| Minimum Focal Length (Focal Distance) | - | 24 mm | |
| Digital Zoom | - | 8x | |
| Self-Timer Delay | - | Yes | |
| Special Effects | HDR, Kaleidoscope | HDR | |
| Camera Modes | Portrait mode | Burst mode, portrait mode, Flowers, Animals, Food, Person, Sunset, Sunrise, City, Landscape | |
| Face Recognition (Face ID) | - | Face detection | LG K51S has face detection. |
| White Balance | - | Automatic | |
| Light Source | Flash | LED flash | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps | 1920 x 1080 (1080p) at 30 fps | |
| Camera Features (Functions) | - | Phase Detect Auto-Focus (PDAF), geotagging, Big Pixels technology, Quad Pixel technology |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 8 Megapixel | 5 Megapixel | Xiaomi Redmi 9 has better second camera resolution than LG K51S. |
|---|---|---|---|
| Lens Type (2nd Camera) | Ultra wide-angle lens | Super wide-angle lens | |
| Lens Aperture (2nd Camera) | F/2.2 | F/2.2 | Both phones have the same second camera lens aperture. |
| Field of View (2nd Camera) | 118 degree(s) | 115 degree(s) | Xiaomi Redmi 9 has larger second camera lens field of view than LG K51S. |
| Minimum Focal Length (2nd Camera) | - | 16 mm |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 5 Megapixel | 2 Megapixel | Xiaomi Redmi 9 has higher resolution third camera than LG K51S. |
|---|---|---|---|
| Lens Aperture (3rd Camera) | F/2.4 | F/2.4 | Both phones have the same lens aperture of the third camera. |
| Field of View (3rd Camera) | - | 88.9 degree(s) | |
| Camera Functions (3rd Camera) | Macro camera | Depth camera |
| FOURTH CAMERA |
|---|
| Sensor Resolution (4th Camera) | 2 Megapixel | 2 Megapixel | Both phones have the same resolution of the fourth camera. |
|---|---|---|---|
| Lens Aperture (4th Camera) | - | F/2.4 | |
| Field of View (4th Camera) | - | 88.6 degree(s) | |
| Camera Functions (4th Camera) | Depth camera | Macro camera | |
| Camera Features (4th Camera) | - | 4cm macro photography |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 8 Megapixel | 13 Megapixel | LG K51S has better front camera resolution than Xiaomi Redmi 9. |
| Lens Aperture (Front) | F/2.0 | - | |
| Field of View (Front) | 77.8 degree(s) | - | |
| Focus Adjustment | Focus free | - | |
| Special Effects (Front) | HDR | - | |
| Camera Modes (Front) | Portrait mode | Gesture Shot, Selfie portrait | |
| Face Recognition (Face ID) | - | Face detection | LG K51S has face detection. |
| Light Source (Front) | Display flash | - | |
| Camera Features (Front) | Self-timer, Palm shutter | 17 filters |
| BATTERY AND CHARGING | Xiaomi Redmi 9 | LG K51S |
|---|
| Battery Capacity (Battery Size) | 5020 mAh | 4000 mAh | Xiaomi Redmi 9 has larger battery capacity than LG K51S. |
|---|---|---|---|
| Standby Time | - | 100 hours | |
| Talk Time | 1860 minutes | 480 minutes | Xiaomi Redmi 9 has longer battery life when making calls than LG K51S. |
| Run Time Details | Talk: up to 1860 min Continuous navigation: up to 19 hrs Playback (video): up to 19 hrs Playback (Music): up to 185 hrs |
Talk: up to 480 min Standby: up to 100 hrs |
|
| Battery Technology | - | Lithium Ion |
| CELLULAR | Xiaomi Redmi 9 | LG K51S |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | - | Android 9.0 Pie | |
| User Interface | - | LG UX 9 | |
| Intelligent Assistant | - | Google Assistant | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS |
| COMMUNICATIONS | Xiaomi Redmi 9 | LG K51S |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, VoLTE, FDD-LTE, TDD-LTE | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE | |
|---|---|---|---|
| 2G Band | - | 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 802.11b/g/n | IEEE 802.11a/b/g/n | |
| Bluetooth | Bluetooth 5.0 | Bluetooth 5.0 BLE | |
| Bluetooth Profiles | - | HFP, HSP, OPP, PAN, SPP, GOEP, A2DP, AVRCP, HID, SAP, GAVDP, PBAP, MAP, GATT, HDP, HOGP, ScPP | |
| NFC | - | Yes | LG K51S has NFC reader for mobile payments. |
| Messaging Services | SMS, MMS | SMS, MMS |
| MEDIA | Xiaomi Redmi 9 | LG K51S |
|---|
| Supported Digital Audio Standards | AAC, PCM, MP3, FLAC, AAC +, eAAC+, APE (Monkey's Audio), AMR-WB, AMR-NB | WMA, AAC, PCM, MP3, FLAC, AAC +, eAAC+, OPUS, AMR-WB, AMR-NB, Vorbis | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, H.264, ASP, MP4 | MKV, FLV, AVI, WMV, ASF, 3GP, TS, WebM, OGM, MP4 | |
| Sound Enhancements | - | DTS: X 3D Surround Sound |
| FEATURES | Xiaomi Redmi 9 | LG K51S |
|---|
| 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, digital compass, distance sensor, infrared (IR) sensor | Accelerometer, ambient light sensor, proximity sensor, digital compass | |
| Security Devices | Face recognition, fingerprint reader | Fingerprint reader | |
| Additional Phone Features | Fast Charging, AI face unlock | DLNA Certified, Dual microphones, KnockON, QuickMemo+ function, Mini View function, Capture+, EasyHome, Clip Tray, Google Lens, AI Cam, Game Tools, Google Assistant Button |
| OTHERS | Xiaomi Redmi 9 | LG K51S |
|---|
| Included Accessories | SIM card removal tool, USB-C cable, TPU case, 10W charger | Power adapter, SIM card removal tool, USB-C cable | |
|---|---|---|---|
| Compliant Standards | - | MIL-STD 810G |
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