If you're stuck trying to work out which smartphone to buy, or you want to give a quick answer to friends and family looking for advice, one way you can approach it is to work out which phone software you like using the best.
Perhaps you like the old-school stylings of Symbian, the no-nonsense approach of iOS or the clean cut lines of Windows Phone? Or perhaps what it looks like isn't that important to you and you're an Android fan. I jest, of course.
Here's my personal take on the current mobile operating systems for anyone confused by the choices. It's not intended to be definitive or exhaustive, but it will hopefully give an idea of what to expect from some of them. My advice for anyone considering a new phone is to, as far as possible, take each operating system for a test-drive in a shop before signing on the dotted line.
The hardware is, of course, important too; depending on which OS you choose, you have to decide between a touchscreen or QWERTY. Do you want a small screen or large? Are you going to be using it as a replacement for your digital camera? But long after the sheen has worn off your new phone, it's the OS that you have to live with every day.
Photo credit: Ben Woods