The verdict
Your pick: LG Q9, ahead on Design & display, Performance & hardware and Connectivity. Unless Camera or Battery & charging decides it for you.
| Category | K51S | Q9 |
|---|---|---|
| Design & display | 5.1 | 7.0 |
| Performance & hardware | 2.7 | 3.5 |
| Camera | 4.0 | 3.0 |
| Connectivity | 4.7 | 5.0 |
| Battery & charging | 3.8 | 2.4 |
Which one is for you?
LG K51S, if you care about…
- Battery Capacity
- 4,000 mAh
- against 3,000 mAh
- Display Diagonal
- 6.55″
- against 6.1″
- OS Version
- 9
- against 8
LG Q9, if you care about…
- RAM Capacity
- 4 GB
- against 3 GB
- Wi-Fi Standards
- Wi-Fi 802.11a/b/g/n/ac, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac)
- against Wi-Fi 802.11 b/g/n, Wi-Fi 4 (802.11n)
- Storage Type
- UFS 2.0
- against eMMC 5.1
- Display Pixel Density
- 564 ppi
- against 282 ppi
Specification comparison
Performance
| Specification | K51S | Q9 |
|---|---|---|
| Processor Model | MediaTek Helio P35 | Qualcomm Snapdragon 821 |
| Processor Process Size | 12 nm Best value | 14 nm |
| Graphics GPU | PowerVR GE8320 | Qualcomm Adreno 530 |
| Storage Type | eMMC 5.1 | UFS 2.0 Best value |
| Maximum CPU Clock | 2.3 GHz Best value | 2.15 GHz |
| Maximum Storage Capacity | 64 GB | 64 GB |
| AnTuTu Score | 103,115 | — |
| Geekbench 6 Single-Core | 164 | — |
| Geekbench 6 Multi-Core | 744 | — |
| CPU Description | Octa-core processor with four 2.3 GHz Cortex-A53 cores and four 1.8 GHz Cortex-A53 cores. | Quad-core (2×2.15 GHz Kryo and 2×1.6 GHz Kryo) |
| Processor Type | Octa-Core | Quad-Core |
| 64-Bit Processor | Yes | Yes |
| RAM Capacity | 3 GB | 4 GB Best value |
| RAM Type | DDR4 | — |
| Expandable Storage | Yes | Yes |
| AnTuTu version | v8 | — |
| Maximum memory card | — | 1 TB |
Design
| Specification | K51S | Q9 |
|---|---|---|
| Body Colors | Titanium, Pink, Blue, Red, Grey | Red, Black, Blue |
| Body Thickness | 8.3 mm | 7.9 mm Best value |
| Body Width | 76.7 mm | 71.9 mm |
| Body Height | 165.2 mm | 153.2 mm |
| Weight | 194.5 g | 159 g Best value |
| Usable Surface | 84 % Best value | 82.6 % |
| Body Materials | Polycarbonate | — |
| Resistance Features | MIL-STD-810G | IP68, MIL-STD-810G |
| Waterproof Depth | — | 1.5 m |
| Unfolded thickness | — | 7.9 mm |
Battery
| Specification | K51S | Q9 |
|---|---|---|
| Battery Capacity | 4,000 mAh Best value | 3,000 mAh |
| Battery Type | Li-Polymer | Li-Ion |
| Fast Charge Power | — | 18 W |
| Battery Features | Non-Removable, Rechargeable, Battery Level Indicator | Non-Removable, Fast Charging, Battery Level Indicator, Rechargeable |
Display
| Specification | K51S | Q9 |
|---|---|---|
| Display Aspect Ratio | 20:9 | 19.5:9 |
| Display Technology | IPS LCD | IPS LCD |
| Display Diagonal | 6.55″ Best value | 6.1″ |
| Display Horizontal Resolution | 720 px | 1,440 px Best value |
| Display Vertical Resolution | 1,600 px | 3,120 px Best value |
| Display Pixel Density | 282 ppi | 564 ppi Best value |
| Display Features | IPS LCD, Scratch Resistant, Hole-Punch Notch, Capacitive Touch, Multi-Touch, Frameless, Touchscreen | HDR10, Capacitive Touch |
Sensors
| Specification | K51S | Q9 |
|---|---|---|
| Fingerprint Sensor Placement | Rear | Rear |
Sensor
| Specification | K51S | Q9 |
|---|---|---|
| Sensor Features | Fingerprint Sensor, Accelerometer, Proximity Sensor, Compass, Light Sensor | Fingerprint Sensor, Accelerometer, Gyroscope, Compass, Proximity Sensor |
Software
| Specification | K51S | Q9 |
|---|---|---|
| Operating System | Android 9 | Android 8.1 |
| OS Family | Android | Android |
| OS Version | 9 Best value | 8 |
| Google Services | Yes | — |
Connectivity
| Specification | K51S | Q9 |
|---|---|---|
| SIM Configurations | Dual Nano-SIM, Dual SIM Dual Standby | Single Nano-SIM, Dual Nano-SIM |
| Cellular Bands | 2G GSM 850, 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 3G UMTS B1, 3G UMTS B2, 3G UMTS B5, 3G UMTS B8, 4G LTE B1, 4G LTE B3, 4G LTE B7, 4G LTE B8, 4G LTE B20, 4G LTE B28A, 4G LTE B28B, 4G LTE B38 | 2G GSM 850, 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 3G UMTS B850, 3G UMTS B900, 3G UMTS 1900, 3G UMTS 2100, 4G LTE B1, 4G LTE B3, 4G LTE B5, 4G LTE B7, 4G LTE B8, LTE B28, 4G LTE B38 |
| Cellular Technologies | GSM, HSPA, UMTS, LTE, 4G | GSM, HSPA, LTE |
| Wi-Fi Standards | Wi-Fi 802.11 b/g/n, Wi-Fi 4 (802.11n) | Wi-Fi 802.11a/b/g/n/ac, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac) Best value |
| Wi-Fi Features | Dual Band, Wi-Fi Hotspot, Wi-Fi Direct, Wi-Fi Display, DLNA | Dual Band, Wi-Fi Direct, DLNA |
| Bluetooth Version | Bluetooth 5.0 | Bluetooth 5.0 |
| Bluetooth Profiles | A2DP, LE | A2DP, LE |
| Navigation Systems | GPS, A-GPS, GLONASS, BeiDou Best value | GPS, GLONASS, BeiDou |
| Connectivity Features | 3.5 mm Audio Jack, NFC, USB Charging, USB Mass Storage, USB OTG, USB Type-C, Computer Sync, OTA Sync, Tethering, DLNA | 3.5 mm Audio Jack, NFC, FM Radio, USB Type-C, USB OTG, DLNA |
| USB Version | USB 2.0 | USB 3.1 Best value |
| SAR American Head | 0.68 W/kg | — |
| SAR American Body | 0.92 W/kg | — |
| SAR (EU) head | 0.501 W/kg | — |
| SAR (EU) body | 1.335 W/kg | — |
| Max. download speed | 300 Mbps | 600 Mbps Best value |
| Max. upload speed | 50 Mbps | 150 Mbps Best value |
Audio
| Specification | K51S | Q9 |
|---|---|---|
| Microphone Count | 1 | 2 Best value |
| Audio Features | A2DP, LE, Loudspeaker | A2DP, LE, Loudspeaker, 32-bit/192 kHz Audio |
Technical
| Specification | K51S | Q9 |
|---|---|---|
| Model numbers | LMK510EMW, LM-K510EMW, LM-K510 | LM-Q925S, LM-Q925L, LM-Q925K |
