LG Q7 BTS (Q727K) vs LG K4 (K121)
Side by side comparison between LG Q7 BTS vs LG K4 phones, differences, pros, cons and full specifications. What's the better?
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5.5"
IPS
IPS
1080x2160
13
MP
MP
5mp
3GB
RAM
RAM
Octa-core
3000
mAh
mAh
(Non removable)
vs
What's the better phone? LG Q7 BTS (Q727K)
The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!
28 Advantages 
2 Advantages | 18 Common items in both devices |
| TFT IPS LCD |
| 16 million |
| LED flash |
| Only digital zoom |
| PDAF: phase detection autofocus / Autofocus |
| EIS: Digital stabilization |
| 4G LTE-A / 4G LTE |
| +11 specs and more in the table below |
Check the comparison table below for more items that are not evaluated in comparison score above.
Highlight differences Clear highlight📱 Model features | ||
| LG Q7 BTS (Q727K) | LG K4 (K121) | |
| Model | LG Q7 BTS (Q727K) | LG K4 (K121) |
| Other model names | LG Q7 BTS edition (KT), LM-Q727K, LMQ727K | (Bell, Rogers, Telus) LG K4 K121, LGK121 |
| Country or region available |  South Korea |  Canada |
| Brand | LG | LG |
| Release date | 8/1/2018 | 2/1/2016 |
| Depth | 8.4 millimeters (0.33 inches) | 8.9 millimeters (0.35 inches) |
| Size (width x height) | 69.33 x 143.8 millimeters (2.73 x 5.66 in) | 66.7 x 131.9 millimeters (2.63 x 5.19 in) |
| Weight | 145 grams (5.08 ounces) | 113 grams (3.96 ounces) |
| Build, materials | Aluminum body, glass front, plastic back | Plastic body, glass front |
| Protection against water and others | IP68 certified: dust/waterproof over 1.5 meters and 30min. MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. | Not supported |
📲 Display | ||
| LG Q7 BTS (Q727K) | LG K4 (K121) | |
| Display type | TFT IPS LCD | TFT IPS LCD |
| Screen size | 5.5" inches | 4.5" inches |
| Screen-to-body ratio | ~78.3% (screen-to-body ratio) | ~63.4% (screen-to-body ratio) |
| Display resolution | 1080x2160 pixels | 480x854 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 439 PPI | 218 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Not supported | Not supported |
| Refresh rate | feature not registered | feature not registered |
| Display features | feature not registered | feature not registered |
🤖 Operating System | ||
| LG Q7 BTS (Q727K) | LG K4 (K121) | |
| System version | Android 8.1 Oreo | Android 5.1.1 Lollipop |
| Firmware update | feature not registered | feature not registered |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| LG Q7 BTS (Q727K) | LG K4 (K121) | |
| Chipset | 64bit: Qualcomm Snapdragon 450 (SDM450) (14nm) | 32bit: Qualcomm Snapdragon 210 MSM8909 (28nm) |
| CPU | Octa-core, 1 processor: 8x 1.8GHz ARM Cortex-A53 (Octa-core) | Quad-core, 1 processor: 4x 1.1GHz ARM Cortex-A7 (Quad-core) |
| GPU graphical controller | Qualcomm Adreno 506 (600MHz) | Qualcomm Adreno 304 |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| LG Q7 BTS (Q727K) | LG K4 (K121) | |
| RAM memory | 3GB LPDDR3 | 1GB LPDDR3 |
| Internal storage | 32GB (20GB available) eMMC 5.1 | 8GB (3.88GB available) |
| External storage | Until 1TB microSD, microSDXC (dedicated slot) | Until 32GB microSD, microSDHC (dedicated slot) |
📶 Mobile networks | ||
| LG Q7 BTS (Q727K) | LG K4 (K121) | |
| Dual-SIM | Not supported | Not supported |
| SIM card | 1 slot (Single-SIM) nano-SIM (4FF) | 1 slot (Single-SIM) micro-SIM (3FF) |
| Maximum Download / Upload | 300/50 Mbps | 150/50 Mbps |
| Network technology | 2G, 3G, 4G | 2G, 3G, 4G |
| Frequency, bands | Expand band details Collapse 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 850/2100 | UMTS 850/1700/1900 |
| Primary 4G network | LTE Cat6 (Bands 1,3,5,7,8,28) TD-LTE (Bands 38,40) | LTE Cat4 (Bands 2, 4, 7, 17) |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE |
| 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 |
📷 Camera | ||
| LG Q7 BTS (Q727K) | LG K4 (K121) | |
| Back camera (main camera) | 13 megapixels | 5 megapixels |
| Main camera resolution | 4128x3096 pixels | 2592x1944 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps | HD (1280x720) 30 fps |
| Flash | LED flash | LED flash |
| Focal aperture | f/2.2 (aperture) | f/2.8 (aperture) |
| Focal length | feature not registered | feature not registered |
| Sensor size | 1/3" inches | feature not registered |
| Pixel size | 1.12µm pixel | feature not registered |
| Autofocus | PDAF: phase detection autofocus | Autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | EIS: Digital stabilization | 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 | Not supported |
| Camera extras | feature not registered | feature not registered |
📸 Front camera | ||
| LG Q7 BTS (Q727K) | LG K4 (K121) | |
| Front camera (secondary) | 5 megapixels | 2 megapixels |
| Front camera resolution | 2560x1920 pixels | 1600x1200 pixels |
| Video recording (secondary) | Full HD (1920x1080) | HD (1280x720) |
| Front flash | Not supported | Not supported |
| Focal aperture | feature not registered | f/2.8 (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 |
🔉 Sound and multimedia | ||
| LG Q7 BTS (Q727K) | LG K4 (K121) | |
| Loudspeaker | Supported | Supported |
| Active noise cancellation | 2 microphones or more | Not supported |
| Radio | FM (RDS) | FM (RDS) |
| TV | Digital TV | Not supported |
| Video formats | MP4, H.264, H.263, XviD, MKV | MP4, H.264, H.263, XviD |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, eAAC+, FLAC |
🔌 Connectivity | ||
| LG Q7 BTS (Q727K) | LG K4 (K121) | |
| USB | USB 2.0 Type-C, USB OTG On-The-Go | MicroUSB 2.0 |
| Audio output | 3.5mm jack | 3.5mm jack |
| TV output | Not supported | Not supported |
| Bluetooth | 4.2 + A2DP | 4.1 + A2DP |
| WiFi | 802.11 b/g/n [wifi4] (2.4GHz) WiFi Direct, hotspot | 802.11 b/g/n [wifi4] (2.4GHz) WiFi Direct, hotspot |
| DLNA | Supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging, GLONASS |
| NFC | Supported | Not supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| LG Q7 BTS (Q727K) | LG K4 (K121) | |
| Sensors | Accelerometer Ambient light sensor Compass Face unlock Fingerprint sensor (rear-mounted) Gyroscope Proximity sensor | Accelerometer Ambient light sensor Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| LG Q7 BTS (Q727K) | LG K4 (K121) | |
| Battery type | Li-Ion: lithium-ion (Non removable) | Li-Ion: lithium-ion (Removable) BL-49JH |
| Battery capacity | 3000 mAh | 1940 mAh |
| Charger, watts | 16.2W (9V/1.8A) Wired fast charging | Wired charging |
| Inductive / wireless charging | feature not registered | feature not registered |
| Talk time autonomy | 14 hours | 9 hours |
| Standby | 440 hours (18.3 days) | 500 hours (20.8 days) |
➕ Other features | ||
| LG Q7 BTS (Q727K) | LG K4 (K121) | |
| Call control | Voice dialing, Voice recorder | Voice dialing, Voice recorder |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (T9), MMS, E-mail, Push mail |
| Hands-free calling | Supported | Supported |
| Video calling | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 | HTML, XHTML, HTML5 |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: Black • 18:9 screen ratio • DTS: X 3D sound • Quick Charge 3.0 • TV T-DMB (Korea) | • Colors: White, Blue • Flash Selfie • Knock Code |
☢️ Radiation rate | ||
| LG Q7 BTS (Q727K) | LG K4 (K121) | |
| 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 |