LG K4 (K121) vs LG Optimus Sol (E730)
Side by side comparison between LG K4 vs LG Optimus Sol phones, differences, pros, cons and full specifications. What's the better?
,
vs
3.8"
AMOLED
AMOLED
480x800
5
MP
MP
0.3mp
512MB
RAM
RAM
Single-core
1500
mAh
mAh
(Removable)
What's the better phone? LG K4 (K121)
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!
15 Advantages 
5 Advantages | 19 Common items in both devices |
| Until 32GB microSD, microSDHC |
| (back) 5MP |
| Only digital zoom |
| Autofocus |
| HD (1280x720) |
| Capacitive |
| Multitouch |
| +12 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 K4 (K121) | LG Optimus Sol (E730) | |
| Model | LG K4 (K121) | Optimus Sol (E730) |
| Other model names | (Bell, Rogers, Telus) LG K4 K121, LGK121 | LG E730 Optimus Sol, LG Victor |
| Country or region available |  Canada | feature not registered |
| Brand | LG | LG |
| Release date | 2/1/2016 | 9/1/2011 |
| Depth | 8.9 millimeters (0.35 inches) | 9.8 millimeters (0.39 inches) |
| Size (width x height) | 66.7 x 131.9 millimeters (2.63 x 5.19 in) | 62.5 x 122.5 millimeters (2.46 x 4.82 in) |
| Weight | 113 grams (3.96 ounces) | 110 grams (3.85 ounces) |
| Build, materials | Plastic body, glass front | feature not registered |
| Protection against water and others | Not supported | Not supported |
📲 Display | ||
| LG K4 (K121) | LG Optimus Sol (E730) | |
| Display type | TFT IPS LCD | Ultra AMOLED |
| Screen size | 4.5" inches | 3.8" inches |
| Screen-to-body ratio | ~63.4% (screen-to-body ratio) | ~53.7% (screen-to-body ratio) |
| Display resolution | 480x854 pixels | 480x800 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 218 PPI | 246 PPI |
| Colors | 16 million | 260 thousand |
| Scratch-resistant glass | Not supported | Gorilla Glass |
| Refresh rate | 60Hz | feature not registered |
| Display features | Not supported | feature not registered |
🤖 Operating System | ||
| LG K4 (K121) | LG Optimus Sol (E730) | |
| System version | Android 5.1.1 Lollipop | Android 2.3.4 Gingerbread |
| Firmware update | feature not registered | Android 2.3.5 Gingerbread |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| LG K4 (K121) | LG Optimus Sol (E730) | |
| Chipset | 32bit: Qualcomm Snapdragon 210 MSM8909 (28nm) | 32bit: Qualcomm Snapdragon MSM8255 |
| CPU | Quad-core, 1 processor: 4x 1.1GHz ARM Cortex-A7 (Quad-core) | Single-core, 1 processor: 1x 1GHz Scorpion (Single-core) |
| GPU graphical controller | Qualcomm Adreno 304 | Qualcomm Adreno 205 |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| LG K4 (K121) | LG Optimus Sol (E730) | |
| RAM memory | 1GB LPDDR3 | 512MB LPDDR2 |
| Internal storage | 8GB (3.88GB available) | 2GB (1GB available) |
| External storage | Until 32GB microSD, microSDHC (dedicated slot) | Until 32GB microSD, microSDHC (dedicated slot) |
📶 Mobile networks | ||
| LG K4 (K121) | LG Optimus Sol (E730) | |
| Dual-SIM | Not supported | Not supported |
| SIM card | 1 slot (Single-SIM) micro-SIM (3FF) | 1 slot (Single-SIM) Standard mini-SIM (2FF) |
| Maximum Download / Upload | 150/50 Mbps | 7.2/2.9 Mbps |
| Network technology | 2G, 3G, 4G | 2G, 3G |
| 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 850/1700/1900 | UMTS 900/2100 |
| Primary 4G network | LTE Cat4 (Bands 2, 4, 7, 17) | Not supported |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE | GPRS, EDGE, UMTS, HSDPA, HSUPA |
| 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 K4 (K121) | LG Optimus Sol (E730) | |
| Back camera (main camera) | 5 megapixels | 5 megapixels |
| Main camera resolution | 2592x1944 pixels | 2560x1920 pixels |
| Video recording (primary) | HD (1280x720) 30 fps | HD (1280x720) 30 fps |
| Flash | LED flash | Not supported |
| Focal aperture | f/2.8 (aperture) | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | feature not registered | feature not registered |
| Autofocus | Autofocus | Autofocus |
| Touch focus | Supported | feature not registered |
| Image stabilization | EIS: Digital stabilization | feature not registered |
| Zoom | Only digital zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection | Face detection |
| BSI sensor | Not supported | feature not registered |
| HDR | Not supported | feature not registered |
| Camera extras | feature not registered | feature not registered |
📸 Front camera | ||
| LG K4 (K121) | LG Optimus Sol (E730) | |
| Front camera (secondary) | 2 megapixels | 0.3 megapixels |
| Front camera resolution | 1600x1200 pixels | 640x480 pixels |
| Video recording (secondary) | HD (1280x720) | Not supported |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.8 (aperture) | feature not registered |
| 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 K4 (K121) | LG Optimus Sol (E730) | |
| Loudspeaker | Supported | Supported |
| Active noise cancellation | Not supported | feature not registered |
| Radio | FM (RDS) | FM |
| TV | Not supported | Not supported |
| Video formats | MP4, H.264, H.263, XviD | MP4, DivX, XviD, WMV, H.264, H.263 |
| Audio formats | MP3, WAV, eAAC+, FLAC | MP3, WAV, WMA, eAAC+ |
🔌 Connectivity | ||
| LG K4 (K121) | LG Optimus Sol (E730) | |
| USB | MicroUSB 2.0 | MicroUSB 2.0 |
| Audio output | 3.5mm jack | 3.5mm jack |
| TV output | Not supported | Not supported |
| Bluetooth | 4.1 + A2DP | 3.0 + A2DP |
| WiFi | 802.11 b/g/n [wifi4] (2.4GHz) WiFi Direct, hotspot | 802.11 b/g/n [wifi4] (2.4GHz) |
| DLNA | Not supported | feature not registered |
| GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging |
| NFC | Not supported | Not supported |
| Infrared port | Not supported | feature not registered |
🧭 Sensors | ||
| LG K4 (K121) | LG Optimus Sol (E730) | |
| Sensors | Accelerometer Ambient light sensor Proximity sensor | Accelerometer Ambient light sensor Compass Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| LG K4 (K121) | LG Optimus Sol (E730) | |
| Battery type | Li-Ion: lithium-ion (Removable) BL-49JH | Li-Ion: lithium-ion (Removable) |
| Battery capacity | 1940 mAh | 1500 mAh |
| Charger, watts | Wired charging | Wired charging |
| Inductive / wireless charging | Not supported | feature not registered |
| Talk time autonomy | 9 hours | 5.9 hours |
| Standby | 500 hours (20.8 days) | 375 hours (15.6 days) |
➕ Other features | ||
| LG K4 (K121) | LG Optimus Sol (E730) | |
| Call control | Voice dialing, Voice recorder | Voice dialing, Voice recorder, Voice commands |
| 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, Flash player |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: White, Blue Knock Code | • Colors: Black, Titan, White • 2GB microSD included • LG Optimus UI • DLNA • WiFi Direct technology • Wi-Fi Mobile Hotspot Java framework |
☢️ Radiation rate | ||
| LG K4 (K121) | LG Optimus Sol (E730) | |
| 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 |