Nokia Lumia 1520
Fancy a bigger screen and super slick Windows integration? Then the 6-inch Nokia Lumia 1520 has you covered.
The Lumia 1520 has the biggest, highest resolution display of any Windows Phone device and its 2.2GHz quad-core processor also means it's the most powerful to rock Microsoft's mobile platform.
Once again you get Microsoft's Office software which sync wirelessly to the cloud, allowing you to easily move work between computer and phone and the increased screen size makes editing easy on the Lumia 1520.
There's little needed in the way of training, as the Windows Phone 8 interface is incredibly intuitive and doesn't offer up the multitude of confusing options that Android does.
Size and weight were always going to be an issue with the Lumia 1520, but considering it can replace the need for a tablet, and even at times a laptop, for a lot of tasks it's definitely a handset you should be considering.
- Read: Nokia Lumia 1520 review
The traditional QWERTY keyboard still has its fans and the BlackBerry Q10 offers the best one on the market.
Fully touchscreen smartphones are great for numerous reasons, but when it comes to the simple task of typing you won't find anything better than a physical array of keys.
With a premium style, 3.1-inch 720p display and the new BlackBerry 10 operating system the Q10 is built for business.
As with the BlackBerry Z30 we've already mentioned in this round up, the Q10 comes with the BES 10 support and a top notch messaging hub ensuring all your communications are secure and easily managed.
When it comes to watching videos, playing games or using apps the Q10 isn't quite so useful, as its square screen makes these exploits rather tricky.
If you're in need of a business handset for predominantly messaging and emails you can't go wrong with the Q10, but if you require your phone to offer a broader range of abilities look elsewhere.
- Read: BlackBerry Q10 review
Samsung Galaxy S4
The Samsung Galaxy S4 has more features than you can shake a stick at and it's no wonder that this is the best selling Android smartphone of 2013.
Its slick Android Jelly Bean interface, responsive, bright 5-inch full HD display and powerful quad-core processor means the Galaxy S4 has the vital statistics to make it a great business tool.
Add to that its highly adaptable email and note-taking applications, a host of connectivity options and on-device encryption to make sure all your top secret files are safe and secure, and you'll want to seriously consider this device.
Android is far more adaptable and customisable than Apple's iOS system, meaning that if you have some technical boffins in your ranks, you will be able to tweak the Galaxy S4 to suit your firm's exact needs.
The Galaxy S4 also comes with Samsung Knox, a mobile solution built specifically for the business sector to ensure handsets are fully secure, from application and platform security to device management.
- Read: Samsung Galaxy S4 review
Google Nexus 5
If you want the best features to price ratio from your smartphones then you'll need to take a look at the Android KitKat running Google Nexus 5.
Manufactured by LG the Nexus 5 sports an impressive 2.3GHz quad-core processor, 4.95-inch full HD display and the latest version of the powerful Android OS all wrapped up in a package which will set you back £300.
The Nexus 5 is beautifully designed, has more connectivity than a BT Telephone Exchange and even excels in the simple matter of making telephone calls.
It is slightly hampered by only being available in 16GB and 32GB sizes with no microSD slot and the camera isn't the strongest here, but that's a minor issue for a business device.
Perhaps Android isn't the best mobile business solution, and the Nexus 5 lacks the additional enterprise features Samsung has added to its devices. But at such a low price it is definitely worth considering.
- Read: Google Nexus 5 review
The Q10 and Z30 are still quite expensive, so if you're desperate for a fleet of business focussed handsets which won't break the bank take a look at the mid-range BlackBerry Q5.
It doesn't look as stylish, nor feel as premium as the Q10 and the isolated buttons on the keyboard are very much a marmite feature, but the Q5 is still a highly capable smartphone.
With the same 3.1-inch 720p display, 2GB of RAM, BlackBerry 10 OS and 4G connectivity as its more expensive brother the BlackBerry Q5 will still make mincemeat of your emails, text messages and BBMs.
Another big advantage of all BB10 handsets are their web browsing ability - pages load in a matter of seconds and it's one of the most fluid surfing experiences you'll have on a smartphone.
As far as affordable smartphones go with a focus on messaging, internet and business the BlackBerry Q5 is one of the best in its class.
- Read: BlackBerry Q5 review