The Nokia Lumia 520 is Nokia's fifth Windows Phone 8 handset. It's a phone which slots into the very bottom end of the range, just below the Nokia Lumia 620.
And we do mean just below - the specs of the 520 and 620 are remarkably similar, meaning that Nokia's main competition at the bottom end of the market is itself. Otherwise, its biggest rival is likely to be the recently launched Huawei Ascend W1 - a low-end handset that we're rather fond of.
Of course if you look beyond Windows Phone 8 then there's also a whole host of Android competitors such as the Huawei Ascend G330 and the Orange San Diego.