Samsung Galaxy S21 FE (SM-G990B/DS 128GB) vs Asus Zenfone Zoom (ZX551ML 128GB)
Side by side comparison between Samsung Galaxy S21 FE vs Asus Zenfone Zoom (ZX551ML) phones, differences, pros, cons and full specifications. What's the better?
,
6.4"
AMOLED
AMOLED
1080x2400
12.2
MP
MP
32mp
6GB
RAM
RAM
Octa-core
4500
mAh
mAh
(Non removable)
vs
5.5"
IPS
IPS
1080x1920
13
MP
MP
5mp
4GB
RAM
RAM
Quad-core
3000
mAh
mAh
(Non removable)
What's the better phone? Samsung Galaxy S21 FE (SM-G990B/DS 128GB)
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!
29 Advantages 
5 Advantages | 16 Common items in both devices |
| 16 million |
| Digital and optical zoom |
| PDAF: phase detection autofocus / LDAF: laser detection autofocus |
| OIS: Optical stabilization |
| Capacitive |
| Multitouch |
| Accelerometer |
| +9 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 S21 FE (SM-G990B/DS 128GB) | Asus Zenfone Zoom (ZX551ML 128GB) | |
| Model | Galaxy S21 FE (SM-G990B/DS 128GB) | Zenfone Zoom (ZX551ML 128GB) |
| Other model names | Galaxy S21 FE 5G SM-G990B/Dual-SIM (Exynos) | Asus Zenfone Zoom ZX551ML (4G), Asus ZX551ML |
| Country or region available |  (Global, International) |   (Latin America), (Europe) |
| Brand | Samsung | Asus |
| Release date | 1/7/2022, Announced: 1/4/2022 | 12/1/2015 |
| Depth | 7.9 millimeters (0.31 inches) | 12 millimeters (0.47 inches) |
| Size (width x height) | 74.5 x 155.7 millimeters (2.93 x 6.13 in) | 78.8 x 158.9 millimeters (3.1 x 6.26 in) |
| Weight | 177 grams (6.2 ounces) | 185 grams (6.48 ounces) |
| Build, materials | Aluminum body, glass front, plastic back | Aluminum frame, glass front, leather back |
| Protection against water and others | IP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant | Not supported |
📲 Display | ||
| Galaxy S21 FE (SM-G990B/DS 128GB) | Asus Zenfone Zoom (ZX551ML 128GB) | |
| Display type | Dynamic AMOLED | TFT IPS LCD |
| Screen size | 6.4" inches | 5.5" inches |
| Screen-to-body ratio | ~85.3% (screen-to-body ratio) | ~66.6% (screen-to-body ratio) |
| Display resolution | 1080x2400 pixels (20:9) | 1080x1920 pixels |
| Touchscreen | Capacitive Multitouch 10-points | Capacitive Multitouch |
| Pixel density (dot pitch) | 411 PPI | 401 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass Victus | Gorilla Glass 4 |
| Refresh rate | 120Hz | feature not registered |
| Display features | 1300nits[peak] HDR10+ Always-On Display | feature not registered |
🤖 Operating System | ||
| Galaxy S21 FE (SM-G990B/DS 128GB) | Asus Zenfone Zoom (ZX551ML 128GB) | |
| System version | Android 12 | Android 5.0.2 Lollipop |
| Firmware update | Android 14 | Android 6.0 Marshmallow |
| User Interface | One UI 4.1 / 5.1 / 6.0 | feature not registered |
⚙️ Processor | ||
| Galaxy S21 FE (SM-G990B/DS 128GB) | Asus Zenfone Zoom (ZX551ML 128GB) | |
| Chipset | 64bit: Samsung Exynos 2100 (5nm) | 64bit: Intel Atom Z3590 (22nm) |
| CPU | 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) | Quad-core, 1 processor: 4x 2.5GHz Intel Silvermont (Quad-core) |
| GPU graphical controller | ARM Mali-G78 MP14 (854MHz) | PowerVR G6430 MP4 |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Galaxy S21 FE (SM-G990B/DS 128GB) | Asus Zenfone Zoom (ZX551ML 128GB) | |
| RAM memory | 6GB LPDDR5 | 4GB LPDDR3 |
| Internal storage | 128GB (97GB available) UFS 3.1 | 128GB (122GB available) |
| External storage | Not supported | Until 128GB microSD, microSDXC (dedicated slot) |
📶 Mobile networks | ||
| Galaxy S21 FE (SM-G990B/DS 128GB) | Asus Zenfone Zoom (ZX551ML 128GB) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card | Not supported |
| SIM card | 2 slots (Dual-SIM) nano-SIM (4FF) | 1 slot (Single-SIM) micro-SIM (3FF) |
| Maximum Download / Upload | 2000/1024 Mbps | 150/50 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 | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 850/900/1700/1900/2100 | UMTS 850/900/1900/2100 |
| Primary 4G network | LTE Cat20 (1, 3, 3, 4, 5, 7, 8, 12, 20, 28) TD-LTE (34, 38, 39, 40, 41) VoLTE | LTE Cat4 (Bands 1, 2, 3, 5, 7, 8, 9, 18, 19, 28) |
| Primary 5G network | SA/NSA/Sub6 (1, 3, 5, 8, 28, 41, 78, 79) | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE |
| Secondary 2G network | GSM 850/900/1800/1900 | Not supported |
| Secondary 3G network | UMTS 850/900/1700/1900/2100 | Not supported |
| Secondary 4G network | LTE Cat20 (1, 3, 3, 4, 5, 7, 8, 12, 20, 28) TD-LTE (34, 38, 39, 40, 41) VoLTE | Not supported |
| Secondary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA | Not supported |
📷 Camera | ||
| Galaxy S21 FE (SM-G990B/DS 128GB) | Asus Zenfone Zoom (ZX551ML 128GB) | |
| Back camera (main camera) | (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 | 13 megapixels |
| Main camera resolution | 4032x3024 pixels | 4128x3096 pixels |
| Video recording (primary) | 4K UHD (3840x2160) 60 fps | Full HD (1920x1080) 30 fps |
| Flash | LED flash | Dual-LED flash |
| Focal aperture | f/1.8 (aperture) | f/2.7 (aperture) |
| Focal length | 26mm lens | 28mm lens |
| Sensor size | 1/1.76" inches | feature not registered |
| Pixel size | 1.8µm pixel | feature not registered |
| Autofocus | PDAF: phase detection autofocus | LDAF: laser 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 | Not supported |
| HDR | HDR photo/video on both cameras | HDR photo only main camera |
| Camera extras | 4K@30/60fps 1080p@30/60fps 1080p@240fps (slow motion) 720p@960fps (slow motion) | feature not registered |
📸 Front camera | ||
| Galaxy S21 FE (SM-G990B/DS 128GB) | Asus Zenfone Zoom (ZX551ML 128GB) | |
| Front camera (secondary) | 32 megapixels | 5 megapixels |
| Front camera resolution | 6528x4896 pixels | 2560x1920 pixels |
| Video recording (secondary) | 4K UHD (3840x2160) | HD (1280x720) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.2 (aperture) | f/2.0 (aperture) |
| Focal length | 26mm lens | feature not registered |
| Sensor size | 1/2.74" inches | feature not registered |
| Pixel size | 0.8µm pixel | feature not registered |
🔉 Sound and multimedia | ||
| Galaxy S21 FE (SM-G990B/DS 128GB) | Asus Zenfone Zoom (ZX551ML 128GB) | |
| 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, H.264, H.263 |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, eAAC+ |
🔌 Connectivity | ||
| Galaxy S21 FE (SM-G990B/DS 128GB) | Asus Zenfone Zoom (ZX551ML 128GB) | |
| USB | USB 3.2 Type-C, USB OTG On-The-Go | MicroUSB 2.0, USB OTG On-The-Go |
| Audio output | Type-C reversible connector | 3.5mm jack |
| TV output | USB Type-C SlimPort® | Not supported |
| Bluetooth | 5.0 + A2DP/LE | 4.0 + A2DP |
| WiFi | 802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot | 802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) WiFi Direct, hotspot |
| DLNA | Supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou | A-GPS, GeoTagging, GLONASS, BeiDou |
| NFC | Supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Galaxy S21 FE (SM-G990B/DS 128GB) | Asus Zenfone Zoom (ZX551ML 128GB) | |
| Sensors | Accelerometer Ambient light sensor Barometer Compass Face unlock Fingerprint sensor (under display) Gyroscope Hall effect Proximity sensor | Accelerometer Ambient light sensor Compass Gyroscope Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Galaxy S21 FE (SM-G990B/DS 128GB) | Asus Zenfone Zoom (ZX551ML 128GB) | |
| Battery type | LiPo: li-ion polymer (Non removable) | LiPo: li-ion polymer (Non removable) |
| Battery capacity | 4500 mAh | 3000 mAh |
| Charger, watts | 25W Wired fast charging Reverse charging by cable USB Power Delivery 3.0 | 18W Wired fast charging |
| Inductive / wireless charging | 15W Qi wireless charging 4.5W Reverse wireless charging | feature not registered |
| Talk time autonomy | feature not registered | feature not registered |
| Standby | feature not registered | feature not registered |
➕ Other features | ||
| Galaxy S21 FE (SM-G990B/DS 128GB) | Asus Zenfone Zoom (ZX551ML 128GB) | |
| 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 | Not supported |
| Miscellaneous | • Colors: Graphite, White, Lavender, Olive | • Colors: Black, White • Asus ZenUI • Hoya camera sensor • Laser autofocus camera (0.03 seconds) • 3x optical zoom camera • Dual tone flash • Fast battery charging: 60% in 40min • Beidou GPS • 5GB Asus Webstorage |
☢️ Radiation rate | ||
| Galaxy S21 FE (SM-G990B/DS 128GB) | Asus Zenfone Zoom (ZX551ML 128GB) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | 0.65W/kg (head), 0.61W/kg (body) | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | 0.952W/kg (head), 1.48W/kg (body) | feature not registered |