Once upon a time there was only one firm on the lips of any business' IT team when it came to company phones – BlackBerry.

A lot has changed since then and BlackBerry's fortunes have taken a turn for the worse, leaving the door wide open for rivals to court the enterprise business.

Now the rest of the pack is hot on its heels, if not already overtaking it, with the likes of Apple, Samsung, Nokia and HTC all vying for a piece of the business pie.

This is great for any potential business buyer, as you now have a wide choice of handsets to choose from, allowing you to select the best phones for your company's requirements.

In no particular order, here are the top 10 smartphones for business use and business users:

HTC One M8

It's been heralded as the "best mobile phone in the world", and rightly so, as the HTC One M8 fuses superb design with excellent functionality.

If you're looking to make a statement the next time you enter a meeting the One M8's full metal body puts it up there with the iPhone 5S in terms of premium style and boardroom presence.

The full HD, 5-inch display is beautiful to look at and the punchy quad-core processor and 2GB of RAM ensures you'll never be short of power.

HTC One M8

There are plentiful amounts of bells and whistles on the HTC One M8 and the Android KitKat operating system allows for a wealth of customisation - although HTC has heavily skinned it with its Sense 6 overlay.

You may find that overlay gets in the way of core business functions, so it's worth checking out the HTC One M8 before hand, but if the interface is manageable you'll be more than happy getting this out in meetings.

The One M8 is also HTCpro certified, which adds additional encryption and mobile device management tools to the handset especially for enterprise customers.

Sony Xperia Z2

If you're looking for something a little more understated, yet still premium and powerful the Sony Xperia Z2 is just the ticket.

A sleek, industrial design coupled with powerful specs including a quad-core processor, 3GB of RAM, 5.2-inch full HD display and an impressive 20.7MP camera means the Xperia Z2 is a high performer all round.

Built in noise cancelling technology means calls will be clearer, and your music tracks crisper when you find yourself in noisy environments.

Sony Xperia Z2

The Xperia suite of business apps including Email, Calendar and Contacts are also present on the Z2, allowing you to keep working even when you're away from your desk.

Sony has also built in a host of security features for businesses into the Xperia Z2 including device, network and storage security.

iPhone 5S

More and more businesses are turning to Apple's smartphone offerings, and while it produces great looking, powerful devices, they certainly come at a price.

The iPhone 5S is the latest in Apple's line up, and while it only builds fractionally on the iPhone 5 it continues to turn heads in every circle.

Apple offers a wide range of enterprise resources on the iPhone 5S with support for SSL VPN and data protection APIs, enabling third party app makers to produce fully secure solutions.

iPhone 5S

There's even a fingerprint scanner hidden beneath the home key on the iPhone 5S, adding another layer of security to the handset.

On the topic of apps, the iPhone family is best placed when it comes to business focussed software, with thousands of applications available on the App Store aimed at making work easier - not to mention Apple's own fleet of business software which is now available for free.

You also get Siri, your own personal digital assistant who listens to your voice and brings you whatever you need, from meeting reminders to the latest footy scores.

The iPhone 5S runs Apple's latest software, iOS 7, which features a fresh new look allowing it to keep pace with the rapidly evolving Android platform.

If your company has already upgraded to the iPhone 5 there really is no need to make the switch to the 5S, you're better off waiting for the iPhone 6 at least.

Sony Xperia Z1 Compact

If your budget can't stretch to a fleet of the latest iPhone and the last thing you want is a load of 5-inch+ smartphones stretching jacket pockets and employee's palms then the pint-sized Z1 Compact is the phone for you.

The Xperia Z1 Compact packs in the same power as its bigger brother, the Xperia Z1, but it comes in a smaller package with a 4.3-inch display.

It may not be a full HD display, but the 720p resolution is fine at this size and it means the Z1 Compact is infinitely more pocketable than its high-end Android rivals.

Sony Xperia Z1 Compact

As well as impressive quad-core power and 2GB of RAM the Z1 Compact also features Android KitKat, a 20.7MP rear camera, plus a dust and waterproof chassis.

Not bad for a smartphone which is just a touch larger than the iPhone 5S.

Samsung Galaxy Note 3

Working on your smartphone is usually problematic due to the restrictive screen, but manufacturers are looking to ease the issues with supersized handsets.

The Samsung Galaxy Note 3 arrives with a huge 5.7-inch, full HD display and its very own S-Pen stylus, merging the line between smartphone and tablet.

If your business is creatively minded then you may find the accuracy of the S-Pen and the ability to draw a real advantage.

Samsung Galaxy Note 3

You can also annotate documents, emails and anything else on screen using the stylus, allowing you to provide instant feedback to colleagues.

Multitasking has always been tricky on smartphones, partly due to the screen size and the fact that it's not really possible to have two apps on screen at once.

Samsung has overcome this problem on the Galaxy Note 3 by allowing you to run two apps side by side on the screen, so you could be looking at the latest financials while tapping out a quick email to the shareholders.

Of course, the size of the handset may hamper some as it isn't the most pocket friendly of devices, nor is it the lightest.

Also, some of the applications, especially those designed for use with the S-Pen, are overly complicated in places so intensive training may be required for some staff.