If there was a theme for today's Nokia keynote, and, by extension, Microsoft's plans for Windows Phone, it's that the OS is being targeted toward lower-spec phones worldwide. The SDK update that'll soon roll out to developers will include an emulator for developers to ensure their apps work on devices like the Lumia 610 that only has 256MB RAM. The company's promising that nearly all apps will work on the cheaper hardware, promising that fragmentation will be kept to a minimum. Any app that runs poorly on the slimmer hardware will be flagged as unsuitable in the Marketplace. Speaking of which, Microsoft has announced it'll be rolling it out to a further 23 countries shortly including China, the UAE and much of Eastern Europe -- increasing the total market reach by up to 60 percent.