Samsung Galaxy Z Flip 5 (SM-F731U1 512GB) vs Samsung Galaxy S21 FE (SM-G9900 128GB)
Side by side comparison between Samsung Galaxy Z Flip 5 vs Samsung Galaxy S21 FE phones, differences, pros, cons and full specifications. What's the better?
,
6.7"
AMOLED
AMOLED
1080x2640
12.2
MP
MP
10mp
8GB
RAM
RAM
Octa-core
3700
mAh
mAh
(Non removable)
vs
6.4"
AMOLED
AMOLED
1080x2400
12.2
MP
MP
32mp
8GB
RAM
RAM
Octa-core
4500
mAh
mAh
(Non removable)
What's the better phone? Samsung Galaxy Z Flip 5 (SM-F731U1 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!
12 Advantages 
6 Advantages | 36 Common items in both devices |
| 8GB LPDDR5X / 8GB LPDDR5 |
| Aluminum frame, flexible plastic screen, glass back / Aluminum body, glass front, plastic back |
| Dynamic AMOLED |
| HDR10+ |
| 120Hz |
| 16 million |
| LED flash |
| +29 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 5 (SM-F731U1 512GB) | Galaxy S21 FE (SM-G9900 128GB) | |
| Model | Galaxy Z Flip 5 (SM-F731U1 512GB) | Galaxy S21 FE (SM-G9900 128GB) |
| Other model names | Galaxy Z Flip5 SM-F731U1 (Unlocked) | Galaxy S21 FE 5G SM-G9900 Dual-SIM (Exynos) |
| Country or region available |  USA |  China |
| Brand | Samsung | Samsung |
| Release date | 8/11/2023, Announced: 7/26/2023 | 1/7/2022, Announced: 1/4/2022 |
| Depth | 6.9 millimeters (0.27 inches) | 7.9 millimeters (0.31 inches) |
| Size (width x height) | 71.9 x 165.1 millimeters (2.83 x 6.5 in) | 74.5 x 155.7 millimeters (2.93 x 6.13 in) |
| Weight | 187 grams (6.55 ounces) | 177 grams (6.2 ounces) |
| Build, materials | Aluminum frame, flexible plastic screen, glass back Back: Gorilla Glass Victus 2 Folded: 15.1 x 71.9 x 85.1 mm | Aluminum body, glass front, plastic back |
| Protection against water and others | IPX8 certified: water resistant up to 1.5 meters and 30min | IP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant |
📲 Display | ||
| Galaxy Z Flip 5 (SM-F731U1 512GB) | Galaxy S21 FE (SM-G9900 128GB) | |
| Display type | Dynamic AMOLED | Dynamic AMOLED |
| Screen size | 6.7" inches | 6.4" inches |
| Screen-to-body ratio | ~85.5% (screen-to-body ratio) | ~85.3% (screen-to-body ratio) |
| Display resolution | 1080x2640 pixels | 1080x2400 pixels (20:9) |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch 10-points |
| Pixel density (dot pitch) | 426 PPI | 411 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Not supported | Gorilla Glass Victus |
| Refresh rate | 120Hz | 120Hz |
| Display features | 1750nits[peak] HDR10+ Always-On Display Extra display: Super AMOLED 3.4" (720x748), 306 ppi, Gorilla Glass Victus 2 | 1300nits[peak] HDR10+ Always-On Display |
🤖 Operating System | ||
| Galaxy Z Flip 5 (SM-F731U1 512GB) | Galaxy S21 FE (SM-G9900 128GB) | |
| System version | Android 13 | Android 12 |
| Firmware update | Android 14 | Android 14 |
| User Interface | One UI 5.1 / 6.0 | One UI 4.1 / 5.1 / 6.0 |
⚙️ Processor | ||
| Galaxy Z Flip 5 (SM-F731U1 512GB) | Galaxy S21 FE (SM-G9900 128GB) | |
| Chipset | 64bit: Qualcomm Snapdragon 8 Gen 2 (SM8550-AC) (4nm) | 64bit: Samsung Exynos 2100 (5nm) |
| CPU | Octa-core, 3 processors: 1x 3.36GHz ARM Cortex-X3 (Single-core) 4x 2.8GHz ARM Cortex-A710/A715 (Quad-core) 3x 2GHz ARM Cortex-A510 (Triple-core) | Octa-core, 3 processors: 1x 2.9GHz ARM Cortex-X1 (Single-core) 3x 2.8GHz ARM Cortex-A78 (Triple-core) 4x 2.2GHz ARM Cortex-A55 (Quad-core) |
| GPU graphical controller | Qualcomm Adreno 740 | ARM Mali-G78 MP14 (854MHz) |
| Performance (benchmark) | AnTuTu: 1200698 (v9), 1507299 (v10) Geekbench: 5478 (v5.5), 4984 (v6.0) GFXBench: 91fps (ES 3.1 onscreen) | feature not registered |
💽 Memory and storage | ||
| Galaxy Z Flip 5 (SM-F731U1 512GB) | Galaxy S21 FE (SM-G9900 128GB) | |
| RAM memory | 8GB LPDDR5X | 8GB LPDDR5 |
| Internal storage | 512GB (453GB available) UFS 4.0 | 128GB (97GB available) UFS 3.1 |
| External storage | Not supported | Not supported |
📶 Mobile networks | ||
| Galaxy Z Flip 5 (SM-F731U1 512GB) | Galaxy S21 FE (SM-G9900 128GB) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card | Dual-SIM Standby - Call active on one sim card |
| SIM card | 1 slot (Single-SIM) nano-SIM (4FF) + e-SIM | 2 slots (Dual-SIM) nano-SIM (4FF) |
| Maximum Download / Upload | 5000/1024 Mbps | 2000/1024 Mbps |
| Network technology | 2G, 3G, 4G, 5G | 2G, 3G, 4G, 5G |
| 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 | CDMA 800, GSM 850/900/1800/1900 |
| Primary 3G network | CDMA2000 1xEV-DO UMTS 850/900/1700/1900/2100 | CDMA2000 1xEV-DO UMTS 850/900/1900/2100 |
| Primary 4G network | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 29, 30, 66, 71) TD-LTE (38, 39, 40, 41, 46, 48) VoLTE | LTE Cat20 (1, 3, 3, 4, 5, 7, 8, 12, 20, 28) TD-LTE (34, 38, 39, 40, 41) VoLTE |
| Primary 5G network | SA/NSA/Sub6 (1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 29, 30, 38, 41, 48, 66, 70, 71, 77, 78) mmWave (257, 258, 260, 261) | SA/NSA/Sub6 (1, 3, 5, 8, 28, 41, 78, 79) |
| 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, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA |
| Secondary 2G network | CDMA 800/1900, GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Secondary 3G network | CDMA2000 1xEV-DO UMTS 850/900/1700/1900/2100 | UMTS 850/900/1900/2100 |
| Secondary 4G network | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 29, 30, 66, 71) TD-LTE (38, 39, 40, 41, 46, 48) VoLTE | LTE Cat20 (1, 3, 3, 4, 5, 7, 8, 12, 20, 28) TD-LTE (34, 38, 39, 40, 41) VoLTE |
| 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 | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA |
📷 Camera | ||
| Galaxy Z Flip 5 (SM-F731U1 512GB) | Galaxy S21 FE (SM-G9900 128GB) | |
| Back camera (main camera) | (dual camera) 12.2 megapixels 12MP ultrawide f/2.2123°1.12µm | (triple camera) 12.2 megapixels 12MP ultrawide f/2.2123°13mm1/3"1.12µm 8MP telephoto f/2.476mm1/4.5"1.0µmPDAFOIS3x-optical-zoom |
| Main camera resolution | 4032x3024 pixels | 4032x3024 pixels |
| Video recording (primary) | 4K UHD (3840x2160) 60 fps | 4K UHD (3840x2160) 60 fps |
| Flash | LED flash | LED flash |
| Focal aperture | f/1.8 (aperture) | f/1.8 (aperture) |
| Focal length | 24mm lens | 26mm lens |
| Sensor size | 1/1.76" inches | 1/1.76" inches |
| Pixel size | 1.8µm pixel | 1.8µm pixel |
| Autofocus | PDAF: phase detection autofocus | PDAF: phase detection autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | OIS: Optical stabilization | OIS: Optical stabilization |
| Zoom | Only digital zoom | Digital and optical zoom |
| Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
| BSI sensor | Supported | Supported |
| HDR | HDR photo/video on both cameras | HDR photo/video on both cameras |
| Camera extras | 4K@30/60fps 1080p@30/60/240fps 720p@960fps HDR10+ Slow motion | 4K@30/60fps 1080p@30/60fps 1080p@240fps (slow motion) 720p@960fps (slow motion) |
📸 Front camera | ||
| Galaxy Z Flip 5 (SM-F731U1 512GB) | Galaxy S21 FE (SM-G9900 128GB) | |
| Front camera (secondary) | 10 megapixels | 32 megapixels |
| Front camera resolution | 3872x2592 pixels | 6528x4896 pixels |
| Video recording (secondary) | 4K UHD (3840x2160) | 4K UHD (3840x2160) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.2 (aperture) | f/2.2 (aperture) |
| Focal length | 23mm lens | 26mm lens |
| Sensor size | feature not registered | 1/2.74" inches |
| Pixel size | 1.22µm pixel | 0.8µm pixel |
🔉 Sound and multimedia | ||
| Galaxy Z Flip 5 (SM-F731U1 512GB) | Galaxy S21 FE (SM-G9900 128GB) | |
| Loudspeaker | Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG | Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG |
| Active noise cancellation | 2 microphones or more | 2 microphones or more |
| Radio | Not supported | Not supported |
| TV | Not supported | Not supported |
| Video formats | MP4, H.265, H.264, H.263, XviD, MKV | MP4, H.265, H.264, H.263, XviD, MKV |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, WMA, eAAC+, FLAC |
🔌 Connectivity | ||
| Galaxy Z Flip 5 (SM-F731U1 512GB) | Galaxy S21 FE (SM-G9900 128GB) | |
| USB | USB 3.2 Type-C, USB OTG On-The-Go | USB 3.2 Type-C, USB OTG On-The-Go |
| Audio output | Type-C reversible connector | Type-C reversible connector |
| TV output | USB Type-C (reversible) | USB Type-C SlimPort® |
| Bluetooth | 5.3 + A2DP/LE | 5.0 + A2DP/LE |
| WiFi | 802.11 a/b/g/n/ac/ax [wifi6E/6] (2.4GHz, 5GHz, 6GHz) + MIMO WiFi Direct, hotspot | 802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot |
| DLNA | Supported | Supported |
| GPS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou |
| NFC | Supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Galaxy Z Flip 5 (SM-F731U1 512GB) | Galaxy S21 FE (SM-G9900 128GB) | |
| Sensors | Accelerometer Ambient light sensor Barometer Compass Face unlock Fingerprint sensor (side-mounted) Gyroscope Hall effect Proximity sensor | Accelerometer Ambient light sensor Barometer Compass Face unlock Fingerprint sensor (under display) Gyroscope Hall effect Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Galaxy Z Flip 5 (SM-F731U1 512GB) | Galaxy S21 FE (SM-G9900 128GB) | |
| Battery type | LiPo: li-ion polymer (Non removable) | LiPo: li-ion polymer (Non removable) |
| Battery capacity | 3700 mAh | 4500 mAh |
| Charger, watts | 25W Wired fast charging Reverse charging by cable USB Power Delivery 3.0 | 25W Wired fast charging Reverse charging by cable USB Power Delivery 3.0 |
| Inductive / wireless charging | 15W Qi Wireless charging (Qi/WPC) 4.5W Reverse wireless charging | 15W Qi wireless charging 4.5W Reverse wireless charging |
| Talk time autonomy | 34 hours (1.4 days) | feature not registered |
| Standby | feature not registered | feature not registered |
➕ Other features | ||
| Galaxy Z Flip 5 (SM-F731U1 512GB) | Galaxy S21 FE (SM-G9900 128GB) | |
| Call control | Voice dialing, Voice recorder, Voice commands | 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, HTML5 |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: Graphite, Cream, Lavender, Gray, Blue, Green, Mint, Yellow • Samsung Pay (Visa, MasterCard) | • Colors: Graphite, White, Lavender, Olive |
☢️ Radiation rate | ||
| Galaxy Z Flip 5 (SM-F731U1 512GB) | Galaxy S21 FE (SM-G9900 128GB) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | 1.17W/kg (head), 0.45W/kg (body) | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | 0.674W/kg (head), 1.501W/kg (body) |