How to claim your free Office 365 subscription with the Lumia 640 and 640 XL

One of the added perks to buying a new Lumia 640 or Lumia 640 XL is one free year of Office 365. It’s not unusual at all for Microsoft to hand out free subscriptions, small Windows 8.1 tablets have been doing it for a while. But it’s unusual for a Lumia phone and it’s not immediately obvious how you go about claiming your freebie.

So here’s what you need to do.