Asus Zenfone 3 Ultra (ZU680KL 64GB) vs Samsung Galaxy S21 FE (SM-G990E/DS 128GB/8GB)
Side by side comparison between Asus Zenfone 3 Ultra vs Samsung Galaxy S21 FE phones, differences, pros, cons and full specifications. What's the better?
,
6.8"
IPS+
IPS+
1080x1920
23
MP
MP
8mp
4GB
RAM
RAM
Octa-core
4600
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 S21 FE (SM-G990E/DS 128GB/8GB)
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!
7 Advantages 
25 Advantages | 18 Common items in both devices |
| 16 million |
| LDAF/PDAF: laser/phase detection autofocus / PDAF: phase detection autofocus |
| OIS (4-axis): Optical stabilization / OIS: Optical stabilization |
| HDR photo on both cameras / HDR photo/video on both cameras |
| 4K UHD (3840x2160) |
| Capacitive |
| Multitouch |
| +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 | ||
| Asus Zenfone 3 Ultra (ZU680KL 64GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| Model | Zenfone 3 Ultra (ZU680KL 64GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) |
| Other model names | Asus Zenfone 3 Ultra 4GB/64GB ZU680KL Dual-Sim, Asus Mercury | Galaxy S21 FE 5G SM-G990B/Dual-SIM (Exynos) |
| Country or region available |  (Global, International) |     Philippines, India, Malaysia, Thailand |
| Brand | Asus | Samsung |
| Release date | 8/1/2016 | 1/7/2022, Announced: 1/4/2022 |
| Depth | 6.8 millimeters (0.27 inches) | 7.9 millimeters (0.31 inches) |
| Size (width x height) | 93.9 x 186.4 millimeters (3.7 x 7.34 in) | 74.5 x 155.7 millimeters (2.93 x 6.13 in) |
| Weight | 233 grams (8.16 ounces) | 177 grams (6.2 ounces) |
| Build, materials | feature not registered | Aluminum body, glass front, plastic back |
| Protection against water and others | Not supported | IP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant |
📲 Display | ||
| Asus Zenfone 3 Ultra (ZU680KL 64GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| Display type | TFT Super IPS+ | Dynamic AMOLED |
| Screen size | 6.8" inches | 6.4" inches |
| Screen-to-body ratio | ~72.8% (screen-to-body ratio) | ~85.3% (screen-to-body ratio) |
| Display resolution | 1080x1920 pixels | 1080x2400 pixels (20:9) |
| Touchscreen | Capacitive Multitouch 10-points | Capacitive Multitouch 10-points |
| Pixel density (dot pitch) | 324 PPI | 411 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass 4 | Gorilla Glass Victus |
| Refresh rate | feature not registered | 120Hz |
| Display features | feature not registered | 1300nits[peak] HDR10+ Always-On Display |
🤖 Operating System | ||
| Asus Zenfone 3 Ultra (ZU680KL 64GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| System version | Android 6.0.1 Marshmallow | Android 12 |
| Firmware update | Android 8.0 Oreo | Android 14 |
| User Interface | feature not registered | One UI 4.1 / 5.1 / 6.0 |
⚙️ Processor | ||
| Asus Zenfone 3 Ultra (ZU680KL 64GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| Chipset | 64bit: Qualcomm Snapdragon 652 MSM8976 (28nm) | 64bit: Samsung Exynos 2100 (5nm) |
| CPU | Octa-core, 2 processors: 4x 1.8GHz ARM Cortex-A72 (Quad-core) 4x 1.4GHz ARM Cortex-A53 (Quad-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 510 600Mhz | ARM Mali-G78 MP14 (854MHz) |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Asus Zenfone 3 Ultra (ZU680KL 64GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| RAM memory | 4GB LPDDR4 | 8GB LPDDR5 |
| Internal storage | 64GB (55GB available) | 128GB (97GB available) UFS 3.1 |
| External storage | Until 256GB microSD, microSDXC (hybrid slot/shares the same SIM-2 slot) | Not supported |
📶 Mobile networks | ||
| Asus Zenfone 3 Ultra (ZU680KL 64GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card (hybrid slot/shares the same microSD slot) | Dual-SIM Standby - Call active on one sim card |
| SIM card | 2 slots (Dual-SIM) micro-SIM (3FF) and nano-SIM (4FF) | 2 slots (Dual-SIM) nano-SIM (4FF) |
| Maximum Download / Upload | 300/50 Mbps | 2000/1024 Mbps |
| Network technology | 2G, 3G, 4G | 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 | Global version: UMTS 800/850/900/1900/2100 China version: CDMA2000, TD-SCDMA 1900/2000 UMTS 800/850/900/1900/2100 | UMTS 850/900/1700/1900/2100 |
| Primary 4G network | LTE Cat6 Global version: LTE (Bands 1,3,5,7,8,18,19,20,26,28) TD-LTE (Bands 38,40,41) China version: LTE (Bands 1,3,5,7,8,18,19,20,26,28) TD-LTE (Bands 38,39,40,41) | LTE Cat20 (1, 3, 3, 4, 5, 7, 8, 12, 20, 28) TD-LTE (34, 38, 39, 40, 41) VoLTE |
| Primary 5G network | Not supported | SA/NSA/Sub6 (1, 3, 5, 8, 28, 41, 78, 79) |
| Primary data network | GPRS, EDGE, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A | 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 | Not supported | UMTS 850/900/1700/1900/2100 |
| Secondary 4G network | Not supported | 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 | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA |
📷 Camera | ||
| Asus Zenfone 3 Ultra (ZU680KL 64GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| Back camera (main camera) | 23 megapixels | (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 | 5520x4140 pixels | 4032x3024 pixels |
| Video recording (primary) | 4K UHD (3840x2160) 24 fps | 4K UHD (3840x2160) 60 fps |
| Flash | Dual-LED flash | LED flash |
| Focal aperture | f/2.0 (aperture) | f/1.8 (aperture) |
| Focal length | feature not registered | 26mm lens |
| Sensor size | 1/2.6" inches | 1/1.76" inches |
| Pixel size | 1.12µm pixel | 1.8µm pixel |
| Autofocus | LDAF/PDAF: laser/phase detection autofocus | PDAF: phase detection autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | OIS (4-axis): 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 | Not supported | Supported |
| HDR | HDR photo on both cameras | HDR photo/video on both cameras |
| Camera extras | feature not registered | 4K@30/60fps 1080p@30/60fps 1080p@240fps (slow motion) 720p@960fps (slow motion) |
📸 Front camera | ||
| Asus Zenfone 3 Ultra (ZU680KL 64GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| Front camera (secondary) | 8 megapixels | 32 megapixels |
| Front camera resolution | 3264x2448 pixels | 6528x4896 pixels |
| Video recording (secondary) | Full HD (1920x1080) | 4K UHD (3840x2160) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.0 (aperture) | f/2.2 (aperture) |
| Focal length | feature not registered | 26mm lens |
| Sensor size | feature not registered | 1/2.74" inches |
| Pixel size | feature not registered | 0.8µm pixel |
🔉 Sound and multimedia | ||
| Asus Zenfone 3 Ultra (ZU680KL 64GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| Loudspeaker | Supported | Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG |
| Active noise cancellation | 2 microphones or more | 2 microphones or more |
| Radio | FM (RDS) | Not supported |
| TV | Not supported | Not supported |
| Video formats | MP4, H.264, H.263 | MP4, H.265, H.264, H.263, XviD, MKV |
| Audio formats | MP3, WAV, eAAC+, FLAC | MP3, WAV, WMA, eAAC+, FLAC |
🔌 Connectivity | ||
| Asus Zenfone 3 Ultra (ZU680KL 64GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| USB | USB 2.0 Type-C reversible connector | USB 3.2 Type-C, USB OTG On-The-Go |
| Audio output | 3.5mm jack | Type-C reversible connector |
| TV output | USB Type-C SlimPort® | USB Type-C SlimPort® |
| Bluetooth | 4.2 + A2DP | 5.0 + A2DP/LE |
| WiFi | 802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) WiFi Direct, hotspot | 802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot |
| DLNA | Not supported | Supported |
| GPS | A-GPS, GeoTagging, GLONASS, BeiDou | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou |
| NFC | Not supported | Supported |
| Infrared port | Supported | Not supported |
🧭 Sensors | ||
| Asus Zenfone 3 Ultra (ZU680KL 64GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| Sensors | Accelerometer Ambient light sensor Compass Fingerprint sensor 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 | ||
| Asus Zenfone 3 Ultra (ZU680KL 64GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| Battery type | Li-Ion: lithium-ion (Non removable) | LiPo: li-ion polymer (Non removable) |
| Battery capacity | 4600 mAh | 4500 mAh |
| Charger, watts | 18W (9V/2A) Wired fast charging | 25W Wired fast charging Reverse charging by cable USB Power Delivery 3.0 |
| Inductive / wireless charging | feature not registered | 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 | ||
| Asus Zenfone 3 Ultra (ZU680KL 64GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| 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, HTML5 |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: Titanium Gray, Glacier Silver, Rose Gold • USB OTG On-The-Go • Asus ZenUI 3.0 • Sony IMX318 sensor camera • DTS headphone • Hi-Res audio 192kHz/24bit • Quick Charge 3.0 • Fast charging battery: 60% in 45min • Miracast | • Colors: Graphite, White, Lavender, Olive |
☢️ Radiation rate | ||
| Asus Zenfone 3 Ultra (ZU680KL 64GB) | Galaxy S21 FE (SM-G990E/DS 128GB/8GB) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | 0.65W/kg (head), 1.19W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | 0.93W/kg (head), 1.319W/kg (body) |