Following the launch of the ZenFone AR a couple of months ago, Asus has announced a new Android phone and called it the ZenFone 4. That's a name Asus has used in the past, which rather confuses things.

When is the ZenFone 4 release date?

The ZenFone 4 is now on sale from Asus' eShop, and you can also buy it from Carphone Warehouse, John Lewis, Amazon, Box and Tesco.

There's a second model the ZenFone 4 Max. The Max refers to a huge 5000mAh battery, not a larger screen. You can see the full specs of both phones below.

How much does the Asus ZenFone 4 cost?

The ZenFone 4 costs £449.99. The big-battery ZenFone 4 Max costs £249.99 from John Lewis.

What are the ZenFone 4's specs?

Here are the key specs in a handy table, so you can compare the two models.

  ZenFone 4 ZenFone 4 Max
Operating system Android 7.1.1 Nougat Android 7.1.1 Nougat
Available colours Moonlight White, Midnight Black Deepsea Black, Rose Pink
Display 5.5in (1920x1080, 401ppi) IPS 5.5in (1280x720,) IPS
Processor Snapdragon 630, octacore at 2.2GHz Snapdragon 430, octacore up to 1.4GHz
GPU Adreno 508 Adreno 505
RAM 4GB 4GB 
Storage 64GB + microSD up to 2TB 32/64GB + microSD up to 2TB 
Primary cameras 12Mp f/1.8 OIS + 8Mp (120° wide-angle) 13Mp f/2.0 + 8Mp (120° wide-angle)
Front camera 8Mp f/2.0 8Mp f/2.0
Video recording 2160p at 30fps EIS, 1080p at 60fps 1080p at 30fps
Wi-Fi 802.11ac  802.11n 
Bluetooth 5 4.1 
NFC Yes No 
LTE Cat 12  Cat 4 (150Mb/s)
SIM Dual nano-SIM (second slot shared with microSD) Dual nano-SIM (plus microSD slot)
Fingerprint scanner Yes, front No
Audio Stereo speakers + Hi-res audio support Mono speaker
Battery 3300mAh, non-removable  5000mAh, non-removable
Wireless charging No No
Waterproof No No
Charge / Sync USB-C micro USB
Dimensions 75.2x155.4 x7.5mm  76.9 x 154 x 8.9 mm
Weight 165g  181g
Model number ZE554KL  ZC554KL

ZenFone 4

It's clear that the ZenFone 4 bears more than a passing resemblance to the 5.5in iPhone, and it even shares the same 1920x1080 resolution.

Asus ZenFone 4 release date, price and specs

Like the iPhone 7 Plus and 8 Plus - and many new phones - there's a dual-camera setup at the rear.

Unlike the majority, though, Asus has gone for a 12Mp main camera and a secondary 8Mp sensor with a wide-angle lens.

Asus ZenFone 4 release date, price and specs

The former uses Sony's flagship IMX362 sensor and it focuses using dual pixel phase-detection autofocus (PDAF). Asus says at 0.03 seconds, it's the world's fastest.

The camera also benefits from optical stabilisation on four axis which allows long(ish) exposures of 1/4 sec. 

and image processing is handled by a Qualcomm Spectra 160 chip. 

The wide-angle camera isn't ultra-wide like LG's recent phones, but it has a 120° field of view which lets you fit a fair bit more in the frame without introducing too much distortion.

There's plenty of flagship-level components including Cat 12 LTE, Bluetooth 5, 802.11ac Wi-Fi, and you get extras missing from the 'Max' version such as USB-C, hi-res audio, stereo speakers, a fingerprint sensor and NFC.

Asus ZenFone 4 release date, price and specs

Asus keeps the price down by sticking with a full HD screen rather than quad HD, and there's no waterproofing.

ZenFone 4 Max

Similar in name and design, but very different inside, the Max is intended to offer huge battery life for those on a tighter budget that don't care so much about having the best cameras and fastest processor.

Asus ZenFone 4 Max

The ZenFone 4 Max can act as a power bank and charge other devices thanks to the included OTG USB cable. 

It has a similar dual camera setup to its pricier stablemate, but although the 13Mp main camera has extra resolution, it doesn't have optical stabilisation.