If there was one thing that was missing in the Nokia Lumia lineup, it was dual-SIM support. The drought has ended with the Lumia 630, an entry-level smartphone from Nokia that holds two firsts to its credit – it's the first Windows Phone dual-SIM device, and also the first to run the very latest version of the OS, i.e. Windows Phone 8.1. Here's how this notable device fares when it comes to real-life usage...