Asus Zenfone 3 (5.2 ZE520KL 16GB) vs Asus Zenfone 2 (ZE551ML 32GB)
Side by side comparison between Asus Zenfone 3 vs Asus Zenfone 2 phones, differences, pros, cons and full specifications. What's the better?
,
5.2"
IPS+
IPS+
1080x1920
16
MP
MP
8mp
2GB
RAM
RAM
Octa-core
2650
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? Asus Zenfone 3 (5.2 ZE520KL 16GB)
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!
15 Advantages 
6 Advantages | 27 Common items in both devices |
| TFT Super IPS+ / TFT IPS LCD |
| 16 million |
| 1080x1920 pixels |
| Dual-LED flash |
| Only digital zoom |
| LDAF/PDAF: laser/phase detection autofocus / Autofocus |
| f/2.0 (aperture) |
| +20 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 (5.2 ZE520KL 16GB) | Asus Zenfone 2 (ZE551ML 32GB) | |
| Model | Zenfone 3 (5.2 ZE520KL 16GB) | Zenfone 2 (ZE551ML 32GB) |
| Other model names | Zenfone 3 ZE520KL 2GB/16GB 5.2" Dual-SIM 1A090BR | Asus Zenfone 2 ZE551ML Dual-sim (32GB + 4GB RAM) |
| Country or region available |      (Global, International), Brazil, China, Philippines, India | feature not registered |
| Brand | Asus | Asus |
| Release date | 7/12/2016 | 3/1/2015 |
| Depth | 7.7 millimeters (0.3 inches) | 10.9 millimeters (0.43 inches) |
| Size (width x height) | 73.98 x 146.87 millimeters (2.91 x 5.78 in) | 77.2 x 152.5 millimeters (3.04 x 6 in) |
| Weight | 144 grams (5.04 ounces) | 170 grams (5.95 ounces) |
| Build, materials | Aluminum body, glass front, plastic back | feature not registered |
| Protection against water and others | Not supported | Not supported |
📲 Display | ||
| Asus Zenfone 3 (5.2 ZE520KL 16GB) | Asus Zenfone 2 (ZE551ML 32GB) | |
| Display type | TFT Super IPS+ | TFT IPS LCD |
| Screen size | 5.2" inches | 5.5" inches |
| Screen-to-body ratio | ~68.6% (screen-to-body ratio) | ~70.8% (screen-to-body ratio) |
| Display resolution | 1080x1920 pixels (16:9) | 1080x1920 pixels |
| Touchscreen | Capacitive Multitouch 10-points | Capacitive Multitouch |
| Pixel density (dot pitch) | 424 PPI | 401 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass 3 | Gorilla Glass 3 |
| Refresh rate | 60Hz | feature not registered |
| Display features | 2.5D glass | feature not registered |
🤖 Operating System | ||
| Asus Zenfone 3 (5.2 ZE520KL 16GB) | Asus Zenfone 2 (ZE551ML 32GB) | |
| System version | Android 6.0.1 Marshmallow | Android 5.0 Lollipop |
| Firmware update | Android 8.0 Oreo | Android 6.0 Marshmallow |
| User Interface | ZenUI 3.0 | feature not registered |
⚙️ Processor | ||
| Asus Zenfone 3 (5.2 ZE520KL 16GB) | Asus Zenfone 2 (ZE551ML 32GB) | |
| Chipset | 64bit: Qualcomm Snapdragon 625 (MSM8953) (14nm) | 64bit: Intel Atom Z3580 |
| CPU | Octa-core, 1 processor: 8x 2GHz ARM Cortex-A53 (Octa-core) | Quad-core, 1 processor: 4x 2.3GHz Intel Silvermont (Quad-core) |
| GPU graphical controller | Qualcomm Adreno 506 (650MHz) | PowerVR G6430 MP4 |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Asus Zenfone 3 (5.2 ZE520KL 16GB) | Asus Zenfone 2 (ZE551ML 32GB) | |
| RAM memory | 2GB LPDDR3 | 4GB LPDDR3 |
| Internal storage | 16GB (10GB available) eMMC 5.1 | 32GB (28GB available) |
| External storage | Until 256GB microSD, microSDXC (hybrid slot/shares the same SIM-2 slot) | Until 64GB microSD, microSDXC (dedicated slot) |
📶 Mobile networks | ||
| Asus Zenfone 3 (5.2 ZE520KL 16GB) | Asus Zenfone 2 (ZE551ML 32GB) | |
| 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 (dedicated slot) |
| SIM card | 2 slots (Dual-SIM) micro-SIM (3FF) and nano-SIM (4FF) | 2 slots (Dual-SIM) micro-SIM (3FF) |
| Maximum Download / Upload | 150/50 Mbps | 150/50 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 | Global: UMTS 850/900/1900/2100 India: UMTS 850/900/2100 Brazil: UMTS 850/900/1700/1900/2100 | UMTS 850/900/1900/2100 |
| Primary 4G network | LTE Cat4 Global: LTE (1, 2, 3, 5, 7, 8, 20) India: LTE (1, 3, 5, 8) TD-LTE (40) Brazil: LTE (1, 2, 3, 4, 5, 7, 8, 17, 28) | 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) |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE |
| Secondary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Secondary 3G network | Global: UMTS 850/900/1900/2100 India: UMTS 850/900/2100 Brazil: UMTS 850/900/1700/1900/2100 | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+ | GPRS, EDGE |
📷 Camera | ||
| Asus Zenfone 3 (5.2 ZE520KL 16GB) | Asus Zenfone 2 (ZE551ML 32GB) | |
| Back camera (main camera) | 16 megapixels | 13 megapixels |
| Main camera resolution | 4608x3456 pixels | 4128x3096 pixels |
| Video recording (primary) | 4K UHD (3840x2160) 30 fps | Full HD (1920x1080) 30 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 | feature not registered |
| Pixel size | feature not registered | feature not registered |
| Autofocus | LDAF/PDAF: laser/phase detection autofocus | Autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | OIS (4-axis): Optical stabilization | feature not registered |
| 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 on both cameras | HDR photo only main camera |
| Camera extras | 4K@30fps 1080p@30/60fps | feature not registered |
📸 Front camera | ||
| Asus Zenfone 3 (5.2 ZE520KL 16GB) | Asus Zenfone 2 (ZE551ML 32GB) | |
| Front camera (secondary) | 8 megapixels | 5 megapixels |
| Front camera resolution | 3264x2448 pixels | 2560x1920 pixels |
| Video recording (secondary) | Full HD (1920x1080) | HD (1280x720) |
| 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 3 (5.2 ZE520KL 16GB) | Asus Zenfone 2 (ZE551ML 32GB) | |
| Loudspeaker | Mono sound (not stereo) 24-bit/192kHz | Supported |
| Active noise cancellation | 2 microphones or more | Not supported |
| 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+, FLAC | MP3, WAV, eAAC+ |
🔌 Connectivity | ||
| Asus Zenfone 3 (5.2 ZE520KL 16GB) | Asus Zenfone 2 (ZE551ML 32GB) | |
| USB | USB 2.0 Type-C, USB OTG On-The-Go | MicroUSB 2.0 |
| Audio output | 3.5mm jack | 3.5mm jack |
| TV output | USB Type-C (reversible) | Not supported |
| Bluetooth | 4.2 + A2DP | 4.0 + 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, BeiDou | A-GPS, GeoTagging, GLONASS |
| NFC | Not supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Asus Zenfone 3 (5.2 ZE520KL 16GB) | Asus Zenfone 2 (ZE551ML 32GB) | |
| Sensors | Accelerometer Ambient light sensor Compass Fingerprint sensor (rear-mounted) Gyroscope Hall effect Proximity sensor | Accelerometer Ambient light sensor Compass Gyroscope Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Asus Zenfone 3 (5.2 ZE520KL 16GB) | Asus Zenfone 2 (ZE551ML 32GB) | |
| Battery type | Li-Ion: lithium-ion (Non removable) | LiPo: li-ion polymer (Non removable) |
| Battery capacity | 2650 mAh | 3000 mAh |
| Charger, watts | 10W (5V/2A) Wired charging | Wired charging |
| Inductive / wireless charging | Not supported | feature not registered |
| Talk time autonomy | feature not registered | feature not registered |
| Standby | feature not registered | feature not registered |
➕ Other features | ||
| Asus Zenfone 3 (5.2 ZE520KL 16GB) | Asus Zenfone 2 (ZE551ML 32GB) | |
| 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: Sapphire Black, Moonlight White, Shimmer Gold | • 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 |
☢️ Radiation rate | ||
| Asus Zenfone 3 (5.2 ZE520KL 16GB) | Asus Zenfone 2 (ZE551ML 32GB) | |
| 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 |