Asus Zenfone 4 A400CXG / A400CG

Audio performance is excellent ; Reasonably priced

Frustrating software ; Performance can be sluggish ; Disappointing camera

Frustrating software made us lose our calm with the ZenFone 4, which is a shame when other aspects like the battery and audio performance are great for a phone at this price.

Decent internal storage at the price, Fair day-to-day performance, Colourful design, Feature-packed camera app

Rubbish battery life, Non-IPS screen, Interface fiddly in places

120° wide-angle lens ; DTS Headphone:X audio ; 4K UHD video recording ; Long-lasting 3300 mAh battery ; Innovative software suite

Display only Full HD resolution

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...

Competent main camera ; Premium Metal and glass build ; Decent gaming performance

Power a bit lacking for the cash ; Beefy bezels

Probably doesn’t signal the start of an Asus assault on our phone-buying habits, but the ZenFone 4 is perfectly potent – if a little too stuck in its ways when it comes to software

Nice design ; Feature packed ; Flexible camera tech ; Long battery life

Unintuitive software ; Underpowered

The Zenfone 4 is one of the best smartphones that Asus has launched to date and it’s great to see the company’s handsets hitting the UK with gusto. However, can the manufacturer best known for its laptops and computing gear really do enough to sway...

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....

ZenUI well thought-out

Camera features hit-and-miss

The Asus ZenFone 4 has the makings of a really good budget Android smartphone, it's got an incredibly cheap price tag and a good set of specs, if the device remains unlaggy in the long-term, like it did when we used the phone then it should be very...