Samsung Galaxy Z Fold 7 (SM-F966B/DS 512GB) vs Samsung Galaxy S21 FE (SM-G990E/DS 128GB/8GB)
Side by side comparison between Samsung Galaxy Z Fold 7 vs Samsung Galaxy S21 FE phones, differences, pros, cons and full specifications. What's the better?
,
8"
AMOLED
AMOLED
1968x2184
200
MP
MP
10mp
12GB
RAM
RAM
Octa-core
4400
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 Fold 7 (SM-F966B/DS 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!
18 Advantages 
4 Advantages | 37 Common items in both devices |
| Aluminum frame, flexible plastic screen, glass back / Aluminum body, glass front, plastic back |
| LTPO AMOLED / Dynamic AMOLED |
| HDR10+ |
| 120Hz |
| 16 million |
| LED flash |
| Digital and optical zoom |
| +30 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 Fold 7 (SM-F966B/DS 512GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| Model | Galaxy Z Fold 7 (SM-F966B/DS 512GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) |
| Other model names | Galaxy Z Fold7 SM-F966B/Dual-SIM | Galaxy S21 FE 5G SM-G990B/Dual-SIM (Exynos) |
| Country or region available |  (Global, International) |     Philippines, India, Malaysia, Thailand |
| Brand | Samsung | Samsung |
| Release date | 7/25/2025, Announced: 7/9/2025 | 1/7/2022, Announced: 1/4/2022 |
| Depth | 4.2 millimeters (0.17 inches) | 7.9 millimeters (0.31 inches) |
| Size (width x height) | 143.2 x 1584 millimeters (5.64 x 62.36 in) | 74.5 x 155.7 millimeters (2.93 x 6.13 in) |
| Weight | 215 grams (7.53 ounces) | 177 grams (6.2 ounces) |
| Build, materials | Aluminum frame, flexible plastic screen, glass back Back: Gorilla Glass Victus 2 Folded: 8.9 mm x 72.8 x 158.4 | 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 Fold 7 (SM-F966B/DS 512GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| Display type | LTPO AMOLED | Dynamic AMOLED |
| Screen size | 8" inches | 6.4" inches |
| Screen-to-body ratio | ~9.1% (screen-to-body ratio) | ~85.3% (screen-to-body ratio) |
| Display resolution | 1968x2184 pixels | 1080x2400 pixels (20:9) |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch 10-points |
| Pixel density (dot pitch) | 367 PPI | 411 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | feature not registered | Gorilla Glass Victus |
| Refresh rate | 120Hz | 120Hz |
| Display features | 2600nits[peak] HDR10+ Always-On Display Extra display: Dynamic LTPO AMOLED 2X 6.5" (1080x2520), 120Hz, Gorilla Glass Ceramic 2 | 1300nits[peak] HDR10+ Always-On Display |
🤖 Operating System | ||
| Galaxy Z Fold 7 (SM-F966B/DS 512GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| System version | Android 16 | Android 12 |
| Firmware update | feature not registered | Android 15 |
| User Interface | One UI 8 | One UI 4.1 / 5.1 / 6.0 / 7.0 |
⚙️ Processor | ||
| Galaxy Z Fold 7 (SM-F966B/DS 512GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| Chipset | 64bit: Qualcomm Snapdragon 8 Elite (SM8750-AC) (3nm) | 64bit: Samsung Exynos 2100 (5nm) |
| CPU | Octa-core, 2 processors: 2x 4.47GHz Oryon V2 Phoenix L (Dual-core) 6x 3.53GHz Oryon V2 Phoenix M (Hexa-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 830 (1200MHz) | ARM Mali-G78 MP14 (854MHz) |
| Performance (benchmark) | AnTuTu: 1995920 (v10) Geekbench: 9152 (v6) | feature not registered |
💽 Memory and storage | ||
| Galaxy Z Fold 7 (SM-F966B/DS 512GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| RAM memory | 12GB LPDDR5X | 8GB LPDDR5 |
| Internal storage | 512GB (476GB available) UFS 4.0 | 128GB (97GB available) UFS 3.1 |
| External storage | Not supported | Not supported |
📶 Mobile networks | ||
| Galaxy Z Fold 7 (SM-F966B/DS 512GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card | Dual-SIM Standby - Call active on one sim card |
| SIM card | 2 slots (Dual-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 | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 850/900/1700/1900/2100 | UMTS 850/900/1700/1900/2100 |
| Primary 4G network | LTE Cat (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 66) TD-LTE (38, 39, 40, 41) 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, 38, 40, 41, 66, 77, 78) | SA/NSA/Sub6 (1, 3, 5, 8, 28, 41, 78, 79) |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6 | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA |
| Secondary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Secondary 3G network | UMTS 850/900/1700/1900/2100 | UMTS 850/900/1700/1900/2100 |
| Secondary 4G network | LTE Cat (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 66) TD-LTE (38, 39, 40, 41) 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, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6 | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA |
📷 Camera | ||
| Galaxy Z Fold 7 (SM-F966B/DS 512GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| Back camera (main camera) | (triple camera) 200 megapixels 10MP telephoto f/2.467mm1.0µmPDAFOIS3x-optical-zoom 12MP ultrawide f/2.2120°1.4µmPDAF | (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 | 20000x10000 pixels | 4032x3024 pixels |
| Video recording (primary) | 8K UHD (7680x4320) 30 fps | 4K UHD (3840x2160) 60 fps |
| Flash | LED flash | LED flash |
| Focal aperture | f/1.7 (aperture) | f/1.8 (aperture) |
| Focal length | 24mm (lens) | 26mm (lens) |
| Sensor size | 1/1.3" inches | 1/1.76" inches |
| Pixel size | 0.6µm 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 | Digital and optical zoom | Digital and optical zoom |
| Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
| BSI sensor | Supported | Supported |
| HDR | HDR photo/video and HDR photo on front camera | HDR photo/video on both cameras |
| Camera extras | 8K@30fps 4K@60fps 1080p@60/120/240fps 720p@960fps 10-bit HDR HDR10+ Extra cover camera: 10MP wide (f/2.2 24mm 1.12µm) | 4K@30/60fps 1080p@30/60fps 1080p@240fps (slow motion) 720p@960fps (slow motion) |
📸 Front camera | ||
| Galaxy Z Fold 7 (SM-F966B/DS 512GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| 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 | 18mm (lens) | 26mm (lens) |
| Sensor size | feature not registered | 1/2.74" inches |
| Pixel size | 1.12µm pixel | 0.8µm pixel |
🔉 Sound and multimedia | ||
| Galaxy Z Fold 7 (SM-F966B/DS 512GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| Loudspeaker | Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG | Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG |
| Active noise cancellation | 3 microphones | 2 microphones |
| 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 Fold 7 (SM-F966B/DS 512GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| 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 | 5.4 + A2DP/LE | 5.0 + A2DP/LE |
| WiFi | 802.11 a/b/g/n/ac/ax/be [wifi7/6E/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, QZSS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou |
| NFC | Supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Galaxy Z Fold 7 (SM-F966B/DS 512GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| Sensors | Accelerometer Ambient light sensor Barometer Compass Face unlock 2D Fingerprint sensor (side-mounted) Gyroscope Proximity sensor UWB (Ultra Wideband) | Accelerometer Ambient light sensor Barometer Compass Face unlock 2D Fingerprint sensor (under display) Gyroscope Hall effect Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Galaxy Z Fold 7 (SM-F966B/DS 512GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| Battery type | LiPo: li-ion polymer (Non removable) | LiPo: li-ion polymer (Non removable) |
| Battery capacity | 4400 mAh | 4500 mAh |
| Charger, watts | 25W Wired fast charging | 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 | feature not registered | feature not registered |
| Standby | feature not registered | feature not registered |
➕ Other features | ||
| Galaxy Z Fold 7 (SM-F966B/DS 512GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| 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: Blue Shadow, Silver Shadow, Jet Black, Mint • Samsung DeX | • Colors: Graphite, White, Lavender, Olive |
☢️ Radiation rate | ||
| Galaxy Z Fold 7 (SM-F966B/DS 512GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | 1.21W/kg (head), 1.26W/kg (body) | 0.65W/kg (head), 1.19W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | 1.418W/kg (head), 1.242W/kg (body) | 0.93W/kg (head), 1.319W/kg (body) |