It has been a longtime coming, but Intel has finally entered the Android sector, choosing Orange as its partner and a handset some might say is an unlikely marriage because of its low price point. At £185 on Orange pay as you go, and free on £15.50 a month plans, the San Diego is hardly a top-end phone. In fact, it's quite the opposite – it fits in at the top-end of the 'budget' sector. You'd never guess that from the look of the San Diego, though. This is a big handset, with a blocky design that won't appeal to everyone. But it comes in at, just, under 10mm thick, and it has some nifty specifications in addition to that processor.

There is an HDMI out port on the left-edge of the chassis. You'll have to provide your own cable, but we can understand that piece of cost cutting to reach a price point. There are twin speakers on the underside, and they push out a reasonable quality of sound. There's an eight-megapixel camera which shoots good-quality stills and a front-facing 1.3-megapixel shooter too. And NFC is built in.

And then there's the screen. It's quite remarkable considering the price of this phone. It measures four inches across diagonal corners and delivers a very impressive 1,024x600 pixels. It is sharp and clear and great for web browsing or watching video in particular, and photos taken with the built-in camera look great too. The screen does lack a bit of brightness and vibrancy, but we're not going to complain too much about that given the cost of this handset.

So, what about Intel's processor? Well it's an Atom Z2460 running at 1.6GHz. It is single core, but its hyper-threading capability means it can act like a dual-core processor at times. It really zipped along, and we found it very positive indeed. There is a caveat though. It might not run every application you want it to.

The thing is, some apps are written to take advantage of ARM-based processors, and Intel's offering won't play ball. Intel has said about 30 percent of apps won't run. In practice we found that most of the common apps you'll need do work, although one of our favourites, Temple Run, is a good example of a well-known title that won't. If you're absolutely tied to a specific app you should check its available before you buy, but otherwise you probably won't notice the difference. When you can run apps, battery life is impressive. We managed to get a day out of a full charge very comfortably, and that's quite a rare thing to say. This being an Orange handset there are some standard Orange add-on apps. Orange Wednesdays is here, for those two-for-one cinema deals. And Orange Gestures is here too, so you can run apps by drawing pre-defined shapes on the screen. There's also Your Orange with which you can keep an eye on data use, calls and messaging.

Handy if you don't want to overstep the boundaries of your monthly allowance. Orange has also added the read-only version of QuickOffice - we'd have liked to see full document creation and editing supported. And there is also room for Dailymotion too. This is a video streaming app that can act as an alternative to YouTube. There are disappointments to be had here, though. The OS version is 2.3.7 so those wanting Android ICS won't be happy. You can't remove the backplate to get at the battery.

The micro SIM sits in a right-sided mounted caddy which we found incredibly difficult to eject. The biggest annoyance of all, though, is the lack of memory expansion. You get 16GB internally. While Orange says there's 12GB accessible, when we checked our review sample we had in fact just 10.7GBfree. That will fill up very quickly if you use the San Diego as a media device.

Overall the San Diego looks like another winning addition to Orange's range of 'city' phones, following in the footsteps of devices like the San Francisco. But it isn't perfect. App compatibility with the Intel processor will be an issue for some, though over time app developers ought to deal with this if Intel processors become widespread. What we can't forgive is the lack of memory expansion, fixed backplate and out-of-date OS. 

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