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Asus Zenfone 2 ZE551ML

alaTest has collected and analyzed 6556 reviews of Asus Zenfone 2 ZE551ML. The average rating for this product is 4.1/5, compared to an average rating of 4.1/5 for other Cell phones for all reviews. Reviews about the portability and screen are generally positive. The usability and price are also mentioned favorably, but many are less positive about the connectivity. There are some mixed reviews about the reception and reliability.

performance, price, usability, screen, portability


We analyzed user and expert ratings, product age and more factors. Compared to other Cell phones the Asus Zenfone 2 ZE551ML is awarded an overall alaScore™ of 91/100 = Excellent quality.

Review analysis

(Based on 6556 reviews)

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Consumer review ( review summary for Asus Zenfone 2 ZE551ML


alaTest has collected and analyzed 67 user reviews of Asus Zenfone 2 ZE551ML from The average user rating for this product is 4.3/5, compared to an average user rating of 4.1/5 for other Cell phones on Opinions about the portability and battery are overall positive. The price and usability also get good comments, but some have doubts about the GPS navigation.

performance, usability, price, battery, portability

GPS navigation

85% of the reviews on give this product a positive rating.

This summary is based on the products: ASUS ZenFone 2 ZE551ML 4G LTE Dual SIM SIM-Free Smartphone (4GB RAM/64GB ROM) (Gold)ASUS ZenFone 2 ZE551ML 4G LTE Dual SIM SIM-Free Smartphone (4GB RAM/64GB ROM) (Gold)

Apr, 2018

Consumer review ( review summary for Asus Zenfone 2 ZE551ML


alaTest has collected and analyzed 2848 user reviews of Asus Zenfone 2 ZE551ML from The average user rating for this product is 4.0/5, compared to an average user rating of 3.8/5 for other Cell phones on People are impressed by the screen and portability. The usability and price are also mentioned favorably. Some have doubts about the connectivity and reliability. The apps and reception get mixed comments.

performance, price, usability, portability, screen

reliability, connectivity

82% of the reviews on give this product a positive rating.

This summary is based on the products: ASUS ZenFone 2 5.5-Inch 16 GB Smartphone - Unlocked (Silver)ASUS ZenFone 2 5.5-Inch 16 GB Smartphone - Unlocked (Silver)

Apr, 2018

Consumer review ( review summary for Asus Zenfone 2 ZE551ML


alaTest has collected and analyzed 32 user reviews of Asus Zenfone 2 ZE551ML from The average user rating for this product is 4.4/5, compared to an average user rating of 3.9/5 for other Cell phones on Comments about the sound and durability are generally positive. The screen and price also get good reviews, but the reliability and portability get critical reviews.

performance, price, screen, durability, sound

portability, reliability

91% of the reviews on give this product a positive rating.

This summary is based on the products: ASUS ZENFONE2 5.5" Intel 2.3GHZ 4GB RAM 64GB Storage SilverASUS ZENFONE2 5.5" Intel 2.3GHZ 4GB RAM 64GB Storage Silver

Apr, 2018

Expert review by : Matt Swider (

Asus Zenfone 2 review


Android phone customizations on the very cheap

Inexpensive Android 5.0 phone ; Spacious display ; Lots of RAM ; Two SIM card slots ; Full of customization options

Cheap look and feel ; Dim screen ; Poor camera quality ; Weak power button

Asus Zenfone 2 is a cheap way to upgrade to an Android 5.0 Lollipop phone, housing a 5.5-inch display and solid specs to boot. But a dull screen, plastic design and poor camera hold this handset back.

Jul, 2015

Expert review by : Michael Sawh (

Asus ZenFone 2 Deluxe


Asus announced the ZenFone 2 at CES back in January and its headline-grabbing feature was the fact it was the first smartphone to pack an impressive but seemingly unecessary 4GB of RAM. Nine months later and the ZenFone 2 Deluxe is taking the very same...

Sep, 2015

Expert review by : Edward Chester (

Asus ZenFone 2


Hands-on: The world's first smartphone with 4GB RAM

The ZenFone 2 looks set to be a very good choice for those wanting a large, relatively premium handset without spending megabucks. It’s attractive looking and comfortable to use and its feature set is very well balanced for its price point. Definitely...

Jan, 2015

Expert review by : Tein Hee Seow (

Asus Zenfone 2 hands-on review


Asus' latest Android smartphone is an affordable beast

Jan, 2015

Expert review by : Adam Shepherd (

Asus smartphone first look - Zenfone 2 Deluxe & more


We look at Asus' avalanche of new devices, including the Zenfone Selfie, Zenfone Zoom and Zenfone 2 Deluxe

Sep, 2015

Expert review by : Gadjo Cardenas Sevilla (

Review: ASUS ZenFone 2


The Asus ZenFone 2 is clearly designed as the company's best vision for a modern Android smartphone. That they have managed to make it affordable and available contract-free, really shakes up the market and puts the ZenFone 2 at the very top tier of...

With the 64GB version, it's not an imperative to want to delete many of these apps. For the most part, you can simply place them in their own folder and ignore them if you don't like them.

Jun, 2015

Expert review by : Raymond Wong (

Asus ZenFone 2: A super fast $300 Intel Atom-powered Android phone [REVIEW]


For $300, the Asus ZenFone 2 gets you super fast performance, a nice 5.5-inch screen, all day battery life and two SIM card slots.

Fast, smooth operating system ; Powerful Intel Atom processor ; Tons of RAM ; Display has really wide viewing angles ; Long battery ; Dual SIM cards

Weak camera, Weird power button location ; Outdated ZenUI launcher ; Somewhat bulky design ; Display isn't bright enough

For $300, the Asus ZenFone 2 gets you super fast performance, a nice 5.5-inch screen and all day battery life.

May, 2015

Expert review by : Nimish Sawant (

Asus Zenfone 2 review: Most things handled well, despite heavy skin; but a disappointing camera - Tech2


We review the world's first phone sporting 4GB RAM - Asus Zenfone 2

Asus Zenfone2 presents a good overall package with high performance numbers. But the excessive bloatware can be a concern for many buyers. While Asus may think it is adding value for its users, not everyone likes unnecessary software shoved down their...

Aug, 2015

Expert review by : Allen Ngo (

Asus ZenFone 2 Smartphone Review


4 GB of RAM! We all knew it was inevitable, but it's finally here -- the first major consumer smartphone with 4 GB dual-channel DDR3 RAM. Not only that, but it can also be had for just $300. Is this 5.5-inch monster enough to lure users away from...

Attractive design, Massive 4 GB of RAM, Fast system performance, 1080p IPS display with high contrast, Dual-SIM support, Rigid chassis, Clear speaker and reception

Faux brushed metal; Plastic and polycarbonate materials, Thicker than competing 5.5-inch models, Below average battery life, Average display brightness, No CDMA version, Soft pictures from camera, No USB 3.0 or MHL, Non-removable battery

For a $200 to $300 smartphone, the ZenFone 2 makes a strong case against more expensive 5.5-inch devices, especially from a design and performance standpoint. The device itself is physically quite large, though no less difficult to grip and use. It's...

Jun, 2015

Expert review by : Andreas Osthoff (

Asus ZenFone 2 Deluxe ZE551ML Smartphone Review


Powered by Intel. The Asus ZenFone 2 Deluxe is pretty well-equipped: Intel quad-core processor, 4 GB of RAM, 128 GB of storage, dual-SIM and PixelMaster camera. Has the manufacturer created a convincing overall package?

interesting design, dual-SIM + storage expansion via microSD, 4 GB RAM and 128 GB storage

comparatively high color deviations, battery integrated, even though the rear cover can be removed, wobbly volume rocker at the back, rear cover made of simple plastic, Android buttons not illuminated

At the beginning of the test, we raised the question whether the Asus ZenFone 2 Deluxe is a convenient package. The answer is yes, because there are no real drawbacks. But let us have a look at the positive aspects first. The highlight of the ZenFone 2...

Product Specifications


Battery Capacity:2500 / 3000
Battery technology:Lithium Polymer (LiPo)
Standby time (2G):315
Standby time (3G):294 / 360 / 467.74
Standby time (4G):267
Talk time (2G):28 / 28.5
Talk time (3G):19 / 25.78

Call management

Call blocking: Yes
Call divert:Y / Yes
Call hold:Y / Yes
Call timer:Y / Yes
Call waiting:Y / Yes
Caller ID:Y / Yes
Conference call:Y / Yes
Speakerphone:Y / Yes
Speed dialing:Y / Yes
Vibrating Alert:Y / Yes


Auto Focus:Y / Yes
Built-in Flash:Y / Yes
Flash type:LED
Front Camera:Y / Yes
Front camera resolution (numeric):2 / 5
Front camera type:Single camera
Main camera resolution (numeric):13 / 8
Night mode: Yes
Rear camera resolution (numeric):13 / 8
Rear camera type:Single camera
Second Camera: Yes
Second camera resolution:2 / 5
Second rear camera resolution (numeric):5
Sensor Type:BSI
Video recording:Y / Yes
Video recording modes:720p,1080p
Zoom capability:Y / Yes


Colour of product:Black / Black, Blue / Black, Carbon / Blue / Gold / Grey / Grey, Silver / Purple / Red / Silver / White
Curved Design: No
Form factor:Bar
Low halogen options available: Yes
Standard colour:Black / Purple / Red / Silver


Aspect Ratio:16:9
Display diagonal:12.7 / 14 / 15.2
Display Resolution:1280 x 720 / 1920 x 1080
Display Type:IPS
Orientation sensor:Y / Yes
Pixel density:403
Screen shape:Flat
Second display:N / No / Yes
Touch screen: Yes
Touch screen type:Capacitive
Touch technology:Multi-touch
Touchscreen:Y / Yes
Touchscreen Type:Capacitive


Accelerometer:Y / Yes
Ambient light sensor:Y / Yes
Gyroscope:Y / Yes
Proximity sensor:Y / Yes


Internal RAM:2 / 4


Chat:Y / Yes
E-mail:Y / Yes
Instant messaging (IM):Y / Yes
MMS (Multimedia Messaging Service):Y / Yes
Short Message Service (SMS):Y / Yes


Audio formats supported:AAC, AMR, MP3 / AAC, MP3, WAV / AAC, MP3, WMA / AAC, MP3, WMA, WMV / AAC, WMV, MP3 / MP3 / Yes
FM radio:Y / Yes
Image formats supported:BMP, JPG, PNG / JPG
Supported video modes:1080p
Video compression formats:3GP, H.262, H.263, MPEG4, VP8
Video formats supported:3GP, AVI, FLV, MKV, MOV, MP4 / 3GP, H.262, H.263, MPEG21, VP6, VP8 / 3GP, H.263, H.264, MPEG4, MPEG4-SP, VP8, VP9 / 3GP, H.263, H.264, MPEG4, VP8, VP9 / XviD


Assisted GPS (A-GPS):Y / Yes
Electronic compass:Y / Yes
GPS: Yes
GPS (satellite):Y / Yes
Position location:Y / Yes


2G bands (primary SIM):850,900,1800,1900 / 900,1900,850,1800
2G bands (secondary SIM):850,2100,900,1900 / 850,900,1800,1900
3G:Y / Yes
3G bands supported:850,900,1700,1800,1900,2100 / 850,900,1900,2100 / 900,1900,850,2100
4G:Y / Yes
4G bands supported:1700,1800,1900,2100 / 1900,2100 / 700,800,850,900,1700,1800,1900,2100,2300,2500,2600 / 700,800,850,900,1700,1800,1900,2100,2300,2600 / 700,800,850,900,1700,1800,1900,2100,2600 / 700,800,850,900,1800,1900,2100,2600 / 700,900,1900,2600,800,1700,2100,850,1800 / 700,900,1900,800,1700,2100,850,1800 / 800,850,900,1700,1800,1900,2100,2600 / 800,900,1700,1800,1900,2100,2600 / 850,1700,1800,1900,2100,2600
4G standard:LTE
4G standards:LTE
Bluetooth:Y / Yes
Bluetooth profiles:A2DP
Bluetooth version:4.0 / 4.0 EDR / 4.0 LE / 4.1+EDR
Near Field Communication (NFC):Y / Yes
SIM card capability:Dual SIM / Single SIM
SIM card type:MicroSIM
Tethering (modem-mode):Y / Yes
Wi-Fi:Y / Yes
Wi-Fi standards:802.11a, 802.11ac, 802.11ad, 802.11b, 802.11g, 802.11n / 802.11a, 802.11ac, 802.11b, 802.11g, 802.11n / 802.11a, 802.11g, 802.11ac, 802.11b, 802.11n / 802.11b, 802.11g, 802.11n / 802.11g, 802.11b, 802.11n / IEEE 802.11a, IEEE 802.11ac, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n / IEEE 802.11a,IEEE 802.11ac,IEEE 802.11b,IEEE 802.11g,IEEE 802.11n / IEEE 802.11b, IEEE 802.11g, IEEE 802.11n / IEEE 802.11b,IEEE 802.11g,IEEE 802.11n

Packaging Content

AC adapter included:Y / Yes
Bundled software:ZenMotion, ASUS Splendid, Kids Mode, SnapView, One Hand Mode, Trend Micro™ Security, Power saving mode, PhotoCollage, PhotoEffects, MiniMovie, Google Apps, File Manager, Quick Memo, Themes, ZenCircle
Cables included:USB
Quick start guide: Yes
Warranty card: Yes


Accelerometer: Yes
Ambient light sensor: Yes
Flight mode:Y / Yes
General Purpose IO: Yes
Graphics & IMC lithography:22
Graphics adapter:Intel® HD Graphics
Gyroscope: Yes
Low halogen options available: Yes
Microphone mute:Y / Yes
Number of Displays Supported:2
Number of displays supported (on-board graphics):2
On-board graphics adapter model:Intel® HD Graphics
Operating system installed:Android
Operating System Version:5 / 5.0 / 5.0 (Lollipop)
Personal info management (PIM):Alarm clock, Calculator, Calendar / Alarm clock, Calculator, Calendar, Events reminder, To-do list / Alarm clock, Calculator, Calendar, Games / Alarm clock, Calculator, Calendar, Notes / Alarm clock, Calculator, Calendar, Notes, To-do list
Personalization:Icons, Menu, Shortcuts / Icons, Menu, Shortcuts, Themes, Widgets / Icons, Menu, Shortcuts, Widgets / Icons, Shortcuts, Themes / Icons, Shortcuts, Themes, Widgets
Proximity sensor: Yes
Subscription type:No subscription
Support for contact groups:Y / Yes
Video call:Y / Yes

Ports & interfaces

Headphone connectivity:3.5 mm
USB connector type:MICRO-USB / Micro-USB B
USB port:Y / Yes
USB version:2.0


64-bit computing: Yes
Conflict Free processor: Yes
Embedded options available: No
Execute Disable Bit:Y / Yes
Idle States:Y / Yes
Memory bandwidth supported by processor (max):12.8
Processor boost frequency:1.6 / 1.83 / 2.33 / 2.5
Processor cache:2
Processor cache type:Smart Cache
Processor Cores:2 / 4
Processor family:Intel Atom / Intel® Atom™ / Qualcomm Snapdragon
Processor frequency:1.6 / 1.8 / 2.3 / 2.33
Processor lithography:22
Processor Model:616 / Z2560 / Z3560 / Z3580 / Z3590
Processor operating modes:64-bit
Processor package size:14 / 14 x 14
Processor threads:4
Supported instruction sets:AES, SSE2, SSE3, SSE4.1, SSE4.2, SSSE3
Thermal Monitoring Technologies:Y / Yes

Processor special features

Enhanced Intel SpeedStep Technology:Y / Yes
Intel 64:Y / Yes
Intel AES New Instructions:No / Yes
Intel Hyper-Threading Technology: Yes
Intel Secure Key: Yes
Intel Smart Idle Technology:Y / Yes
Intel Virtualization Technology (VT-x):Y / Yes
Intel Wireless Display (WiDi) Technology: Yes
Intel® AES New Instructions (Intel® AES-NI):N / No / Y / Yes
Intel® Hyper Threading Technology (Intel® HT Technology):Y / Yes
Intel® Secure Key:Y / Yes
Intel® Wireless Display (Intel® WiDi):Y / Yes


Operating system installed:Android
Operating System Version:5 / 5.0 / 5.0 (Lollipop)


Compatible memory cards:MicroSD (TransFlash) / MicroSD (TransFlash), MicroSDHC, MicroSDXC / MicroSD (TransFlash), MicroSDXC
Internal RAM:2 / 2048 / 4 / 4096
Internal RAM type:LPDDR2 / LPDDR3
Internal storage capacity:128 / 16 / 32 / 64 / 8
Maximum memory card size:128 / 64 / 65
RAM capacity:2 / 3 / 4
USB mass storage:Y / Yes


Subscription type:No subscription

Technical Details

Google applications:Google Play


Video call: Yes

Weight & Dimensions

Depth:1.09 / 10.6 / 10.9 / 14.8 / 148.1 / 15.2 / 152.5 / 7.15
Height :1.09 / 10.9 / 14.8 / 15.2 / 15.3 / 152.5 / 164.6 / 3.9
Weight:155 / 170 / 190
Width:14.8 / 7.15 / 7.72 / 71.5 / 77.2 / 84