Asus Zenfone 2 (ZE551ML 32GB) vs Asus Zenfone 3 Ultra (ZU680KL 64GB)
Side by side comparison between Asus Zenfone 2 vs Asus Zenfone 3 Ultra phones, differences, pros, cons and full specifications. What's the better?
,
5.5"
IPS
IPS
1080x1920
13
MP
MP
5mp
4GB
RAM
RAM
Quad-core
3000
mAh
mAh
(Non removable)
vs
6.8"
IPS+
IPS+
1080x1920
23
MP
MP
8mp
4GB
RAM
RAM
Octa-core
4600
mAh
mAh
(Non removable)
What's the better phone? Asus Zenfone 3 Ultra (ZU680KL 64GB)
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!
5 Advantages 
17 Advantages | 26 Common items in both devices |
| TFT IPS LCD / TFT Super IPS+ |
| 16 million |
| 1080x1920 pixels |
| Dual-LED flash |
| Only digital zoom |
| Autofocus / LDAF/PDAF: laser/phase detection autofocus |
| f/2.0 (aperture) |
| +19 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 2 (ZE551ML 32GB) | Asus Zenfone 3 Ultra (ZU680KL 64GB) | |
| Model | Zenfone 2 (ZE551ML 32GB) | Zenfone 3 Ultra (ZU680KL 64GB) |
| Other model names | Asus Zenfone 2 ZE551ML Dual-sim (32GB + 4GB RAM) | Asus Zenfone 3 Ultra 4GB/64GB ZU680KL Dual-Sim, Asus Mercury |
| Country or region available | feature not registered |  (Global, International) |
| Brand | Asus | Asus |
| Release date | 3/1/2015 | 8/1/2016 |
| Depth | 10.9 millimeters (0.43 inches) | 6.8 millimeters (0.27 inches) |
| Size (width x height) | 77.2 x 152.5 millimeters (3.04 x 6 in) | 93.9 x 186.4 millimeters (3.7 x 7.34 in) |
| Weight | 170 grams (5.95 ounces) | 233 grams (8.16 ounces) |
| Build, materials | feature not registered | feature not registered |
| Protection against water and others | Not supported | Not supported |
📲 Display | ||
| Asus Zenfone 2 (ZE551ML 32GB) | Asus Zenfone 3 Ultra (ZU680KL 64GB) | |
| Display type | TFT IPS LCD | TFT Super IPS+ |
| Screen size | 5.5" inches | 6.8" inches |
| Screen-to-body ratio | ~70.8% (screen-to-body ratio) | ~72.8% (screen-to-body ratio) |
| Display resolution | 1080x1920 pixels | 1080x1920 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch 10-points |
| Pixel density (dot pitch) | 401 PPI | 324 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass 3 | Gorilla Glass 4 |
| Refresh rate | feature not registered | feature not registered |
| Display features | feature not registered | feature not registered |
🤖 Operating System | ||
| Asus Zenfone 2 (ZE551ML 32GB) | Asus Zenfone 3 Ultra (ZU680KL 64GB) | |
| System version | Android 5.0 Lollipop | Android 6.0.1 Marshmallow |
| Firmware update | Android 6.0 Marshmallow | Android 8.0 Oreo |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| Asus Zenfone 2 (ZE551ML 32GB) | Asus Zenfone 3 Ultra (ZU680KL 64GB) | |
| Chipset | 64bit: Intel Atom Z3580 | 64bit: Qualcomm Snapdragon 652 MSM8976 (28nm) |
| CPU | Quad-core, 1 processor: 4x 2.3GHz Intel Silvermont (Quad-core) | Octa-core, 2 processors: 4x 1.8GHz ARM Cortex-A72 (Quad-core) 4x 1.4GHz ARM Cortex-A53 (Quad-core) |
| GPU graphical controller | PowerVR G6430 MP4 | Qualcomm Adreno 510 600Mhz |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Asus Zenfone 2 (ZE551ML 32GB) | Asus Zenfone 3 Ultra (ZU680KL 64GB) | |
| RAM memory | 4GB LPDDR3 | 4GB LPDDR4 |
| Internal storage | 32GB (28GB available) | 64GB (55GB available) |
| External storage | Until 64GB microSD, microSDXC (dedicated slot) | Until 256GB microSD, microSDXC (hybrid slot/shares the same SIM-2 slot) |
📶 Mobile networks | ||
| Asus Zenfone 2 (ZE551ML 32GB) | Asus Zenfone 3 Ultra (ZU680KL 64GB) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card (dedicated slot) | Dual-SIM Standby - Call active on one sim card (hybrid slot/shares the same microSD slot) |
| SIM card | 2 slots (Dual-SIM) micro-SIM (3FF) | 2 slots (Dual-SIM) micro-SIM (3FF) and nano-SIM (4FF) |
| Maximum Download / Upload | 150/50 Mbps | 300/50 Mbps |
| Network technology | 2G, 3G, 4G | 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 850/900/1900/2100 | Global version: UMTS 800/850/900/1900/2100 China version: CDMA2000, TD-SCDMA 1900/2000 UMTS 800/850/900/1900/2100 |
| Primary 4G network | LTE Cat4 800/850/900/1700/1800/1900/2100/2600 Bands (1,2,3,4,5,7,8,20) - USA: 700/800/850/900/1700/1800/1900/2100/2600 (Bands 1,2,3,4,5,7,8,17,20) | 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) |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE | GPRS, EDGE, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A |
| Secondary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | GPRS, EDGE | GPRS, EDGE |
📷 Camera | ||
| Asus Zenfone 2 (ZE551ML 32GB) | Asus Zenfone 3 Ultra (ZU680KL 64GB) | |
| Back camera (main camera) | 13 megapixels | 23 megapixels |
| Main camera resolution | 4128x3096 pixels | 5520x4140 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps | 4K UHD (3840x2160) 24 fps |
| Flash | Dual-LED flash | Dual-LED flash |
| Focal aperture | f/2.0 (aperture) | f/2.0 (aperture) |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | 1/2.6" inches |
| Pixel size | feature not registered | 1.12µm pixel |
| Autofocus | Autofocus | LDAF/PDAF: laser/phase detection autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | feature not registered | OIS (4-axis): Optical stabilization |
| Zoom | Only digital zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
| BSI sensor | Not supported | Not supported |
| HDR | HDR photo only main camera | HDR photo on both cameras |
| Camera extras | feature not registered | feature not registered |
📸 Front camera | ||
| Asus Zenfone 2 (ZE551ML 32GB) | Asus Zenfone 3 Ultra (ZU680KL 64GB) | |
| Front camera (secondary) | 5 megapixels | 8 megapixels |
| Front camera resolution | 2560x1920 pixels | 3264x2448 pixels |
| Video recording (secondary) | HD (1280x720) | Full HD (1920x1080) |
| Front flash | Not supported | Not supported |
| Focal aperture | feature not registered | f/2.0 (aperture) |
| 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 2 (ZE551ML 32GB) | Asus Zenfone 3 Ultra (ZU680KL 64GB) | |
| Loudspeaker | Supported | Supported |
| Active noise cancellation | Not supported | 2 microphones or more |
| Radio | FM (RDS) | FM (RDS) |
| 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+, FLAC |
🔌 Connectivity | ||
| Asus Zenfone 2 (ZE551ML 32GB) | Asus Zenfone 3 Ultra (ZU680KL 64GB) | |
| USB | MicroUSB 2.0 | USB 2.0 Type-C reversible connector |
| Audio output | 3.5mm jack | 3.5mm jack |
| TV output | Not supported | USB Type-C SlimPort® |
| Bluetooth | 4.0 + A2DP | 4.2 + A2DP |
| WiFi | 802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) WiFi Direct, hotspot | 802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) WiFi Direct, hotspot |
| DLNA | Not supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging, GLONASS, BeiDou |
| NFC | Supported | Not supported |
| Infrared port | Not supported | Supported |
🧭 Sensors | ||
| Asus Zenfone 2 (ZE551ML 32GB) | Asus Zenfone 3 Ultra (ZU680KL 64GB) | |
| Sensors | Accelerometer Ambient light sensor Compass Gyroscope Proximity sensor | Accelerometer Ambient light sensor Compass Fingerprint sensor Gyroscope Hall effect Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Asus Zenfone 2 (ZE551ML 32GB) | Asus Zenfone 3 Ultra (ZU680KL 64GB) | |
| Battery type | LiPo: li-ion polymer (Non removable) | Li-Ion: lithium-ion (Non removable) |
| Battery capacity | 3000 mAh | 4600 mAh |
| Charger, watts | Wired charging | 18W (9V/2A) Wired fast charging |
| Inductive / wireless charging | feature not registered | feature not registered |
| Talk time autonomy | feature not registered | 34 hours (1.4 days) |
| Standby | feature not registered | feature not registered |
➕ Other features | ||
| Asus Zenfone 2 (ZE551ML 32GB) | Asus Zenfone 3 Ultra (ZU680KL 64GB) | |
| Call control | Voice dialing, Voice recorder | 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: Black, Gold, Gray, Red, White • Asus ZenUI • Fast battery charging: 60% in 40min • 5GB free ASUS WebStorage • OpenGL 3.0 • Asus BoostMaster 18W adapter included | • 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 |
☢️ Radiation rate | ||
| Asus Zenfone 2 (ZE551ML 32GB) | Asus Zenfone 3 Ultra (ZU680KL 64GB) | |
| 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 |