Samsung Galaxy Z Flip 4 (SM-F721U 512GB) vs LG Optimus F3Q (D520)
Side by side comparison between Samsung Galaxy Z Flip 4 vs LG Optimus F3Q phones, differences, pros, cons and full specifications. What's the better?
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6.7"
AMOLED
AMOLED
1080x2640
12.2
MP
MP
10mp
8GB
RAM
RAM
Octa-core
3700
mAh
mAh
(Non removable)
vs
What's the better phone? Samsung Galaxy Z Flip 4 (SM-F721U 512GB)
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!
27 Advantages 
4 Advantages | 14 Common items in both devices |
| 16 million |
| LED flash |
| Only digital zoom |
| PDAF: phase detection autofocus / Autofocus |
| Capacitive |
| Multitouch |
| Accelerometer |
| +7 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 | ||
| Galaxy Z Flip 4 (SM-F721U 512GB) | LG Optimus F3Q (D520) | |
| Model | Galaxy Z Flip 4 (SM-F721U 512GB) | Optimus F3Q (D520) |
| Other model names | Galaxy Z Flip4 5G (SM-F721U1) | T-Mobile LG Optimus F3Q 4G LTE, LG FX3, LG D520 |
| Country or region available |  USA | feature not registered |
| Brand | Samsung | LG |
| Release date | 8/25/2022, Announced: 8/10/2022 | 1/1/2014 |
| Depth | 6.9 millimeters (0.27 inches) | 14 millimeters (0.55 inches) |
| Size (width x height) | 71.9 x 165.2 millimeters (2.83 x 6.5 in) | 64.8 x 121.9 millimeters (2.55 x 4.8 in) |
| Weight | 187 grams (6.55 ounces) | 160 grams (5.6 ounces) |
| Build, materials | Aluminum frame, flexible plastic screen, glass back Back: Gorilla Glass Victus+ Folded: 15.9 x 71.9 x 84.9 mm | feature not registered |
| Protection against water and others | IPX8 certified: water resistant up to 1.5 meters and 30min | Not supported |
📲 Display | ||
| Galaxy Z Flip 4 (SM-F721U 512GB) | LG Optimus F3Q (D520) | |
| Display type | Dynamic AMOLED | TFT IPS LCD |
| Screen size | 6.7" inches | 4" inches |
| Screen-to-body ratio | ~85.4% (screen-to-body ratio) | ~57.7% (screen-to-body ratio) |
| Display resolution | 1080x2640 pixels | 480x800 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 426 PPI | 233 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Not supported | Not supported |
| Refresh rate | 120Hz | feature not registered |
| Display features | 1200nits[peak] HDR10+ Always-On Display Extra display: Super AMOLED 1.9" (260x512), Gorilla Glass Victus+ | feature not registered |
🤖 Operating System | ||
| Galaxy Z Flip 4 (SM-F721U 512GB) | LG Optimus F3Q (D520) | |
| System version | Android 12 | Android 4.1.2 Jelly Bean |
| Firmware update | Android 14 | feature not registered |
| User Interface | One UI 4.1 / 5.1 / 6.0 | feature not registered |
⚙️ Processor | ||
| Galaxy Z Flip 4 (SM-F721U 512GB) | LG Optimus F3Q (D520) | |
| Chipset | 64bit: Qualcomm Snapdragon 8+ Gen 1 (SM8475) (4nm) | 32bit: Qualcomm Snapdragon 400 MSM8930 |
| CPU | Octa-core, 3 processors: 1x 3.19GHz ARM Cortex-X2 (Single-core) 3x 2.75GHz ARM Cortex-A710 (Triple-core) 4x 2GHz ARM Cortex-A510 (Quad-core) | Dual-core, 1 processor: 2x 1.2GHz Krait 200 (Dual-core) |
| GPU graphical controller | Qualcomm Adreno 730 (818MHz) | Qualcomm Adreno 305 |
| Performance (benchmark) | AnTuTu: 685765 (v8), 800001 (v9) Geekbench: 3913 (v5.1) GFXBench: 74fps (ES 3.1 onscreen) | feature not registered |
💽 Memory and storage | ||
| Galaxy Z Flip 4 (SM-F721U 512GB) | LG Optimus F3Q (D520) | |
| RAM memory | 8GB LPDDR5 | 1GB LPDDR2 |
| Internal storage | 512GB (448GB available) UFS 3.1 | 4GB (1GB available) |
| External storage | Not supported | Until 32GB microSD, microSDHC (dedicated slot) |
📶 Mobile networks | ||
| Galaxy Z Flip 4 (SM-F721U 512GB) | LG Optimus F3Q (D520) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card | Not supported |
| SIM card | 1 slot (Single-SIM) nano-SIM (4FF) + e-SIM | 1 slot (Single-SIM) Standard mini-SIM (2FF) |
| Maximum Download / Upload | 5000/1024 Mbps | 100/50 Mbps |
| Network technology | 2G, 3G, 4G, 5G | 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 | CDMA 800/1900, GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Primary 3G network | CDMA2000 1xEV-DO UMTS 850/900/1700/1900/2100 | UMTS 850/1700/1900/2100 |
| Primary 4G network | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 66, 71) TD-LTE (38, 39, 40, 41, 46, 48) VoLTE | LTE 700/1700/1900/2100 |
| Primary 5G network | SA/NSA/Sub6 (2, 5, 25, 41, 66, 71) mmWave (260, 261) | Not supported |
| Primary data network | GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6, mmWave | GPRS, EDGE, UMTS, HSDPA, HSUPA, LTE |
| Secondary 2G network | CDMA 800/1900, GSM 850/900/1800/1900 | Not supported |
| Secondary 3G network | CDMA2000 1xEV-DO UMTS 850/900/1700/1900/2100 | Not supported |
| Secondary 4G network | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 66, 71) TD-LTE (38, 39, 40, 41, 46, 48) VoLTE | Not supported |
| Secondary data network | GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6, mmWave | Not supported |
📷 Camera | ||
| Galaxy Z Flip 4 (SM-F721U 512GB) | LG Optimus F3Q (D520) | |
| Back camera (main camera) | (dual camera) 12.2 megapixels 12MP ultrawide f/2.2123°1.12µm | 5 megapixels |
| Main camera resolution | 4032x3024 pixels | 2560x1920 pixels |
| Video recording (primary) | 4K UHD (3840x2160) 60 fps | Full HD (1920x1080) 30 fps |
| Flash | LED flash | LED flash |
| Focal aperture | f/1.8 (aperture) | feature not registered |
| Focal length | 24mm lens | feature not registered |
| Sensor size | 1/1.76" inches | feature not registered |
| Pixel size | 1.8µm pixel | feature not registered |
| Autofocus | PDAF: phase detection autofocus | Autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | OIS: Optical stabilization | feature not registered |
| Zoom | Only digital zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
| BSI sensor | Supported | Not supported |
| HDR | HDR photo/video on both cameras | HDR photo only main camera |
| Camera extras | 4K@30/60fps 1080p@30/60/240fps 720p@960fps HDR10+ Slow motion | feature not registered |
📸 Front camera | ||
| Galaxy Z Flip 4 (SM-F721U 512GB) | LG Optimus F3Q (D520) | |
| Front camera (secondary) | 10 megapixels | 0.3 megapixels |
| Front camera resolution | 3872x2592 pixels | 640x480 pixels |
| Video recording (secondary) | 4K UHD (3840x2160) | VGA (640x480) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.4 (aperture) | feature not registered |
| Focal length | 26mm lens | feature not registered |
| Sensor size | 1/3" inches | feature not registered |
| Pixel size | 1.22µm pixel | feature not registered |
🔉 Sound and multimedia | ||
| Galaxy Z Flip 4 (SM-F721U 512GB) | LG Optimus F3Q (D520) | |
| Loudspeaker | Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG | Supported |
| Active noise cancellation | 2 microphones or more | Not supported |
| Radio | Not supported | Not supported |
| TV | Not supported | Not supported |
| Video formats | MP4, H.265, H.264, H.263, XviD, MKV | MP4, DivX, H.264, H.263, WMV |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, WMA, eAAC+, FLAC |
🔌 Connectivity | ||
| Galaxy Z Flip 4 (SM-F721U 512GB) | LG Optimus F3Q (D520) | |
| USB | USB 2.0 Type-C, USB OTG On-The-Go | MicroUSB 2.0 |
| Audio output | Type-C reversible connector | 3.5mm jack |
| TV output | USB Type-C (reversible) | Not supported |
| Bluetooth | 5.2 + A2DP/LE | 4.0 + A2DP |
| WiFi | 802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot | 802.11 b/g/n [wifi4] (2.4GHz) |
| DLNA | Supported | Supported |
| GPS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou | S-GPS, GeoTagging |
| NFC | Supported | Supported |
| Infrared port | Not supported | feature not registered |
🧭 Sensors | ||
| Galaxy Z Flip 4 (SM-F721U 512GB) | LG Optimus F3Q (D520) | |
| Sensors | Accelerometer Ambient light sensor Barometer Compass Face unlock Fingerprint sensor (side-mounted) Gyroscope Hall effect Proximity sensor | Accelerometer Ambient light sensor Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Galaxy Z Flip 4 (SM-F721U 512GB) | LG Optimus F3Q (D520) | |
| Battery type | LiPo: li-ion polymer (Non removable) | Li-Ion: lithium-ion (Removable) |
| Battery capacity | 3700 mAh | 2460 mAh |
| Charger, watts | 25W Wired fast charging Reverse charging by cable USB Power Delivery 3.0 | Wired charging |
| Inductive / wireless charging | 15W Qi Wireless charging (Qi/WPC) 4.5W Reverse wireless charging | feature not registered |
| Talk time autonomy | 34 hours (1.4 days) | 15 hours |
| Standby | feature not registered | 360 hours (15 days) |
➕ Other features | ||
| Galaxy Z Flip 4 (SM-F721U 512GB) | LG Optimus F3Q (D520) | |
| Call control | Voice dialing, Voice recorder, Voice commands | 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 | Retractable QWERTY keyboard |
| Miscellaneous | • Colors: Graphite, White, Bora Purple, Pink Gold, Blue, Yellow, Navy, Khaki, Red • Samsung Pay (Visa, MasterCard) | • Colors: Blue • T-Mobile TV • Quick MEMO • HAC M3/T3 • WiFi hotspot • Java framework |
☢️ Radiation rate | ||
| Galaxy Z Flip 4 (SM-F721U 512GB) | LG Optimus F3Q (D520) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | 1.02W/kg (head), 0.94W/kg (body) | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |