Windows Phone 7.5 "Mango" update begins It's underway! This morning, at roughly 10 a.m. Pacific time, we began rolling out the Mango update to phones around the world. I'm sure you're as excited as we are: Windows Phone 7.5 (aka Mango) is our largest and most feature-packed software refresh to date. I do want to emphasize that today is just the start. Our plan, as I'll explain in a moment, is to ramp up delivery gradually -- but make the update available to most existing customers within 4 weeks. I'm sure you have lots of questions about the update process and especially when you'll be able to install Windows Phone 7.5. Here's our plan. Who's first? Today we're starting the roll out of Windows Phone 7.5 to more than 98 percent of existing Windows Phone customers. This is a simultaneous, coordinated, global update that cuts across carriers, phone models, and countries. This time, almost everybody is going first. While today's rollout includes most of our carriers and handsets, we're not making Mango available to everyone at once. So it could be a few weeks before an update message for Windows Phone 7.5 appears on your phone. Why don't we just blast it out? It's a fair question. Delivering Windows Phone 7.5 simultaneously to so many phone models and carriers requires the right engineering balance. Speed is a priority -- but so is quality. We're not just delivering our new operating system but also new software supplied by individual handset makers.