Asus Zenfone Zoom (ZX551ML 32GB) vs ZTE V821
Side by side comparison between Asus Zenfone Zoom (ZX551ML) vs ZTE V821 phones, differences, pros, cons and full specifications. What's the better?
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5.5"
IPS
IPS
1080x1920
13
MP
MP
5mp
4GB
RAM
RAM
Quad-core
3000
mAh
mAh
(Non removable)
vs
What's the better phone? Asus Zenfone Zoom (ZX551ML 32GB)
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 | 5 Common items in both devices |
| Hands-free calling |
| Vibrating alert |
| 3.5mm jack |
| A-GPS, GeoTagging, GLONASS, BeiDou / A-GPS, GeoTagging |
| MicroUSB 2.0, USB OTG On-The-Go / MicroUSB 2.0 |
| + 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 Zoom (ZX551ML 32GB) | ZTE V821 | |
| Model | Zenfone Zoom (ZX551ML 32GB) | ZTE V821 |
| Other model names | Asus Zenfone Zoom ZX551ML (4G), Asus ZX551ML | ZTE V821, ZTE GV821, ZTE GSM V821 Dual Chip, Dual SIM |
| Country or region available |   (Latin America), (Europe) | feature not registered |
| Brand | Asus | ZTE |
| Release date | 12/1/2015 | 6/1/2011 |
| Depth | 12 millimeters (0.47 inches) | 12.4 millimeters (0.49 inches) |
| Size (width x height) | 78.8 x 158.9 millimeters (3.1 x 6.26 in) | 61 x 110 millimeters (2.4 x 4.33 in) |
| Weight | 185 grams (6.48 ounces) | 120 grams (4.2 ounces) |
| Build, materials | Aluminum frame, glass front, leather back | feature not registered |
| Protection against water and others | Not supported | Not supported |
📲 Display | ||
| Asus Zenfone Zoom (ZX551ML 32GB) | ZTE V821 | |
| Display type | TFT IPS LCD | CSTN - passive matrix |
| Screen size | 5.5" inches | 2.4" inches |
| Screen-to-body ratio | ~66.6% (screen-to-body ratio) | ~26.6% (screen-to-body ratio) |
| Display resolution | 1080x1920 pixels | 320x240 pixels |
| Touchscreen | Capacitive Multitouch | Resistive Single touch 1-point |
| Pixel density (dot pitch) | 401 PPI | 167 PPI |
| Colors | 16 million | 65 thousand |
| Scratch-resistant glass | Gorilla Glass 4 | Not supported |
| Refresh rate | feature not registered | feature not registered |
| Display features | feature not registered | feature not registered |
🤖 Operating System | ||
| Asus Zenfone Zoom (ZX551ML 32GB) | ZTE V821 | |
| System version | Android 5.0.2 Lollipop | Android 2.2.1 Froyo |
| Firmware update | Android 6.0 Marshmallow | feature not registered |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| Asus Zenfone Zoom (ZX551ML 32GB) | ZTE V821 | |
| Chipset | 64bit: Intel Atom Z3590 (22nm) | MediaTek MT6516 |
| CPU | Quad-core, 1 processor: 4x 2.5GHz Intel Silvermont (Quad-core) | Single-core, 1 processor: Single-core ARM926EJ-S rev 5 (Single-core) |
| GPU graphical controller | PowerVR G6430 MP4 | feature not registered |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Asus Zenfone Zoom (ZX551ML 32GB) | ZTE V821 | |
| RAM memory | 4GB LPDDR3 | feature not registered |
| Internal storage | 32GB (26GB available) | 256MB (100MB available) |
| External storage | Until 128GB microSD, microSDXC (dedicated slot) | Until 32GB microSD, microSDHC (dedicated slot) |
📶 Mobile networks | ||
| Asus Zenfone Zoom (ZX551ML 32GB) | ZTE V821 | |
| Dual-SIM | Not supported | Dual-SIM Standby - Call active on one sim card (dedicated slot) |
| SIM card | 1 slot (Single-SIM) micro-SIM (3FF) | 2 slots (Dual-SIM) Standard mini-SIM (2FF) |
| Maximum Download / Upload | 150/50 Mbps | 0.236 Mbps |
| Network technology | 2G, 3G, 4G | 2G |
| 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 850/900/1900/2100 | Not supported |
| Primary 4G network | LTE Cat4 (Bands 1, 2, 3, 5, 7, 8, 9, 18, 19, 28) | Not supported |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE | GPRS, EDGE |
| Secondary 2G network | Not supported | GSM 850/900/1800/1900 |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | Not supported | GPRS |
📷 Camera | ||
| Asus Zenfone Zoom (ZX551ML 32GB) | ZTE V821 | |
| Back camera (main camera) | 13 megapixels | 2 megapixels |
| Main camera resolution | 4128x3096 pixels | 1600x1200 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps | QCIF (176x144) |
| Flash | Dual-LED flash | Not supported |
| Focal aperture | f/2.7 (aperture) | feature not registered |
| Focal length | 28mm (lens) | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | feature not registered | feature not registered |
| Autofocus | LDAF: laser detection autofocus | Not supported |
| Touch focus | Supported | feature not registered |
| Image stabilization | OIS: Optical stabilization | feature not registered |
| Zoom | Digital and optical zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection | feature not registered |
| BSI sensor | Not supported | feature not registered |
| HDR | HDR photo only main camera | feature not registered |
| Camera extras | feature not registered | feature not registered |
📸 Front camera | ||
| Asus Zenfone Zoom (ZX551ML 32GB) | ZTE V821 | |
| Front camera (secondary) | 5 megapixels | Not supported |
| Front camera resolution | 2560x1920 pixels | Not supported |
| Video recording (secondary) | HD (1280x720) | Not supported |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.0 (aperture) | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | feature not registered | feature not registered |
🔉 Sound and multimedia | ||
| Asus Zenfone Zoom (ZX551ML 32GB) | ZTE V821 | |
| Loudspeaker | Supported | Supported |
| Active noise cancellation | Not supported | feature not registered |
| Radio | Not supported | FM |
| TV | Not supported | Not supported |
| Video formats | MP4, H.264, H.263 | MP4, H.264, H.263 |
| Audio formats | MP3, WAV, eAAC+ | MP3, WAV, eAAC+ |
🔌 Connectivity | ||
| Asus Zenfone Zoom (ZX551ML 32GB) | ZTE V821 | |
| USB | MicroUSB 2.0, USB OTG On-The-Go | MicroUSB 2.0 |
| Audio output | 3.5mm jack | 3.5mm jack |
| TV output | Not supported | Not supported |
| Bluetooth | 4.0 + A2DP | 2.1 + A2DP |
| WiFi | 802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) WiFi Direct, hotspot | 802.11 b/g [wifi3] (2.4GHz) |
| DLNA | Not supported | feature not registered |
| GPS | A-GPS, GeoTagging, GLONASS, BeiDou | A-GPS, GeoTagging |
| NFC | Supported | Not supported |
| Infrared port | Not supported | feature not registered |
🧭 Sensors | ||
| Asus Zenfone Zoom (ZX551ML 32GB) | ZTE V821 | |
| Sensors | Accelerometer Ambient light sensor Compass Gyroscope Proximity sensor | Not supported |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Asus Zenfone Zoom (ZX551ML 32GB) | ZTE V821 | |
| Battery type | LiPo: li-ion polymer (Non removable) | Li-Ion: lithium-ion (Removable) Li3709T42P3h483757 |
| Battery capacity | 3000 mAh | 900 mAh |
| Charger, watts | 18W Wired fast charging | Wired charging |
| Inductive / wireless charging | feature not registered | feature not registered |
| Talk time autonomy | feature not registered | 7.5 hours |
| Standby | feature not registered | 316.7 hours (13.2 days) |
➕ Other features | ||
| Asus Zenfone Zoom (ZX551ML 32GB) | ZTE V821 | |
| Call control | Voice dialing, Voice recorder | Voice recorder |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS, MMS, E-mail |
| Hands-free calling | Supported | Supported |
| Video calling | Supported | Not supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 | HTML, XHTML |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Fixed QWERTY keyboard |
| Miscellaneous | • 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 | • Colors: Black on red • WiFi hotspot • Java framework |
☢️ Radiation rate | ||
| Asus Zenfone Zoom (ZX551ML 32GB) | ZTE V821 | |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |