4. Windows Phone
Which brings us to the unloved Windows Phone. Unloved, but possibly perfect for small businesses - especially if you use Windows 10, Office 365, Skype, and so on. And while it lacks the app support of Android or iPhone, it still has support for all the big apps. The media story isn't much to write home about, and the phones themselves are far from sexy. But they work.
And Windows 10 for mobile offers good compatibility with other Microsoft software, great security features, and the ability for a sys admin to look after a fleet from anywhere.
Windows Phone have obvious downsides. Its OS uptake is trailing behind the others listed and the amount of apps available is embarrassingly small, but with the initial release of Windows 10 for mobile, this could all change. Particularly for business users.
When opting for a Windows Phone, a good choice is the Microsoft Lumia 950. Users can purchase a Windows Continuum and connect their phone to a monitor, which will run full Windows without the need for a PC. Pretty cool.
Even better is the HP Elite x3 which offers an exceptional battery life, solid specs and a great user experience, although it will set you back £700 plus.