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6.3/10
Informr score
The Asus ZenFone 4 A400CG currently has an Informr score of 6.3 out of 10. This score is based on our evaluation of 6 sources including reviews from users and the web's most trusted critics.

What's good

  • Ergonomic and manageable sized screen
  • Smooth performance
  • Quality construction and materials
  • Good camera for the price

What's bad

  • Poor battery life
  • Poor viewing angles
  • No flash
  • No LTE connectivity

The Asus Zenfone 4 is Asus's first attempt at a basic budget smartphone. At 4.9 x 2.4 x 0.4 inches, the Zenfone 4 is downright small compared to many of its competitors. Reviewers point out that the petite size combined with the curved, soft-touch back panel make this a very ergonomic and manageable phone. They add that while the device is made entirely of plastic it is well constructed and has a nice heft that makes it feel more premium than it actually is.

In a market saturated with 5-inch+ displays, the Zenfone 4 sports a comparatively small 4-inch LCD screen. In order to stay in-line with the budget price, the display doesn't have the best resolution around at 480x800, but thanks to its small size it still manages a respectable 233ppi pixel density. For the most part, the screen delivers a solid experience with critics pointing out the fairly accurate and vivid colors. They mention, however, that the screen suffers from contrast shift when viewing it at different angles and poor bright light legibility.

With a 1.2GHz dual-core processor and 1GB of RAM, the Zenofone 4 isn't going to wow anyone with its blazing speed. Still, it is powerful enough that experts had no problem performing routine tasks like browsing web pages, navigating the home page and launching apps. The 1GB of memory is on the higher side for phones in this category and allowed critics to have several apps in the background without a significant hit to performance. The device also comes with 8GB of internal storage and an expandable microSD slot. Sadly, it does not come with 4G LTE connectivity.

Despite its fairly solid performance, the one drawback of the phone is its poor battery life. The 1600mAh battery barely lasted reviewers a full day of standard web browsing and use. When they put video streaming into the mix, it only lasted a mere 3 hours. Luckily, the battery pack is removable so users can have a spare charged pack on hand if necessary.

For its price-range, critics were sufficiently happy with the 5MP rear camera. It comes packed with a slew of different modes like: HDR, Selfies, Panorama, Beautification and Smart Remove, which are generally reserved for higher-end devices. For the most part, reviewers were very happy with the image quality in good lighting situations though Recombu noticed some blurring and color inaccuracy. They were also fairly impressed with low-light pictures, though the lack of flash makes it impossible to take photos in extremely dark situations.

Although experts bemoan the battery life, overall they were pleasantly surprised with the Zenfone 4. NDTV states, "…the Zenfone 4 is a fantastically capable device…" Gearbun adds, "…the Zenfone 4 is one of the best Android smartphones to be released in recent times…"


Operating system
Android
Processor
1.2 GHz
Screen Size
4"
Camera
5+ MP


What the Critics Are Saying...


tech2

The Asus Zenfone 4 packs lots of features into a tiny package. But the budget price means that the phone has cut corners, which is evident in the low-resolution display and underpowered processor and camera. Yet, there’s lots to like about the Zenfone 4: the design and the build quality is one...

- Alina Lewis, tech2
Tech Advisor

For £99, we're impressed by the ZenFone 4. It's nicely designed, has brilliant software features, is suitably speedy and has decent battery life, but it's not outstanding. We'd like to see a slightly better camera and the addition of 4G connectivity.We'd suggest checking out the EE Kestrel and...

- Ashleigh Allsopp, Tech Advisor
Recombu

The Asus Zenfone 4 is a dinky but highly usable Android phone boasting strong performance but sadly woeful battery life.

- Chris Barraclough, Recombu
Fone Arena

The Asus Zenfone 4 is a good device and offers more in terms of build quality, attractive UI and storage space considering the low price tag. 1 GB RAM does result into medium multi tasking up to some extent which is a surely one of the plus points of the phone. However, we feel that it could have of...

- Sneha Bokil-Paranjape, Fone Arena
NDTV

The Zenfone 4 might be cheap, but it's no slouch when it comes to performance.

- Jamshed Avari, NDTV


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Quick view

Screen Size
4"

The Asus ZenFone 4 A400CG's screen size is 4 inches with 480 x 800 pixels resolution.

Processor
1.2 GHz

There is a Intel Atom Z2520 Dual core 1.2 GHz processor (CPU).

OS

The phone runs on the Android 4.3 Jelly Bean (Update Available: 4.4 KitKat) operating system (OS).

Camera
5+ MP

You can take photos with the phone's onboard 5+ megapixel camera.

There is also a secondary front facing camera with VGA (640 x 480) resolution.

Storage
8 GB

Internal memory is 8 GB. An external, MicroSD, MicroSDHC (up to 64 GB) expansion slot is available for increased storage capacity.

Battery
1200mAh

The phone is powered by a Lithium-Ion (Li-Ion), 1200 mAh battery. Asus's performance ratings are 720 minutes.

ZenFone 4 A400CG Specs

Overview
Release date May 21, 2014
Regions available United Kingdom
Mobile / Cellular Data
Networks
GSM:
850/900/1800/1900 MHz
UMTS:
850/900/1900/2100 MHz
Data:
GPRS, EDGE, HSUPA, HSPA+
SIM card size
Yes
Dual SIM Yes
Operating System Android 4.3 Jelly Bean (Update Available: 4.4 KitKat)

Compare Android Smartphones

Processor Intel Atom Z2520 Dual core 1.2 GHz
Internal Storage 8 GB
RAM 1 GB
ROM No
GPS Type A-GPS
Hearing Aid Compatible No
TTY/TDD No
Noise Cancellation No
SAR Head: 1.04 W/kg
Body: 1.18 W/kg
Languages English
Manufacturer Warranty 1 Year
Accessories Included USB Power Adapter, Manual, Standard Battery, Data Cable
Power & battery
Battery Type Lithium-Ion (Li-Ion)
Battery Capacity 1200 mAh
Removable Battery Yes
Wireless Charging No
Fast Charging No
Video Playback Time Up to: 314 minutes
Internet Use (Wi-Fi) Unknown
Internet Use (Celluar) Unknown
Talk Time Up to: 720 minutes
Standby Time Up to: 8 days
Physical Characteristics
Design type Bar
Multi-Use Smart Phone / PDA Yes
Material Plastic
Colors Charcoal Black, Pearl White, Cherry Red, Sky Blue, Solar Yellow
Dimensions [H x W x D] 12.4 x 6.1 x 1.1 cm (4.9 x 2.4 x 0.4 in)
Weight 115 grams
Water Resistant / Waterproof Unknown
Rugged design No
IP Rating No
Display / Screen
Type Color
Technology LCD (TFT)
Colors 16.7 million
Resolution 480 x 800 pixels
Pixel density 233 pixels
Size 4 inches
Secondary Display No
Sensors Proximity, Motion / Accelerometer
Graphics Yes
Themes No
Backlit Illumination Yes
Zoom / Magnification Yes
Screen Orientation Lock Yes
Multi-Touch Yes
Fingerprint-Resistant Coating No
Additional Display Features Capacitive touch screen
Input / Navigation
Sleep / Wake Key Yes
Home Key Yes
Mute Key No
Input Type Touchscreen
Navigation Type Touchscreen
Predictive Text Entry Yes
Physical keyboard No
Voicemail Key No
Any Key Answer No
Voice Commands Yes
Keypad/Screen Lock Yes
External Volume Control Yes
External Media Playback Controls No
Fingerprint Sensor No
Call Management
Wi-Fi Calling Unknown
Voice over LTE (VoLTE) Unknown
Contact List Capacity Depends on system memory
Multiple Numbers Per Contact Email address, Other fields
Contact Groups Yes
Auto Answer No
Voice Activated Dialing Yes
Photo Caller ID Yes
Web / Email / Messaging
Web Browser Yes
Email Client Yes
Email Protocols POP3, IMAP, SMTP, Microsoft Exchange
Additional Email Features Gmail
Messaging SMS, MMS, IM
Push-to-talk (PTT) No
Connectivity
USB Micro-USB 2.0
USB OTG Support No
Infrared No
Bluetooth 4.0
Bluetooth Profiles A2DP
Bluetooth Audio Codecs SBC, aptX
WiFi 802.11 b/g/n
WiFi Encryption No
Mobile Hotspot Yes
WiMAX No
Memory Expansion Slot Yes
Expansion Slot Info MicroSD, MicroSDHC (up to 64 GB)
PC Synchronization Yes
TV Out No
DLNA Support No
NFC No
Data Tethering Compatibility Yes
Java Applications No
Brew Applications No
ECML / Digital Wallet No
Camera
Main Camera
Aperture
Unknown
Resolution
5+ megapixels
Multi-camera
No
Zoom
Yes
Flash
No
Additional Rear Camera Info
Face detection, Geotagging, ISO, Self-timer, White balance, Exposure value, Burst shot
Video Recording Formats
3GP / 3GPP, H.264 / AVC, MPEG-4
Video Recording Parameters
Full HD (1920 x 1080 pixels), 30 fps
Front Camera
Resolution
VGA (640 x 480)
Zoom
Yes
Additional Front Camera Info
No
Video Recording Parameters
Audio / Video
Audio Playback Yes
Audio Formats AAC, AAC+, eAAC+, MIDI, MP3, MP4, WAV
Radio Yes (FM)
Video Playback Yes
Video Playback Formats 3GP / 3GPP, H.264 / AVC, MPEG-4
Streaming Video Yes
External Speakers Yes
Headset Jack 3.5mm
Custom Ringtones Yes
Vibration Alert Yes
Downloadable Ringtones Yes
Ringer ID Yes
Haptic Feedback Vibration Yes
Speakerphone Yes
Apps
To-Do / Task List Yes
Calendar Yes
World Clock Yes
Alarm Yes
Stop Watch Yes
Timer Yes
Calculator Yes
Currency Converter No
Weather Yes
Stocks No
Maps Yes
NotePad Yes
Voice Memos / Recorder Yes
Games Downloadable
Apps Downloadable
Included Software / Apps -
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Additional comments Other Names (AKA): Asus A400CG

Related Links Manual (PDF)
Asus ZenFone 4 A400CG Reviews
Where to buy Asus ZenFone 4 A400CG
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