Nokia X2 user can directly install the app from the store, while Nokia X , Nokia X+ and NOkia XL owners need to update their devices to the latest firmware first, which has started rolling out already.
Apart from the global navigation, there are some usability improvements coming with this update as well. First-time user has been experience made more intuitive and easy. The updated HERE Maps comes with better quality satellite imagery and improved login experience with a HERE account.
You can go to Nokia Store on your devices for updating the app.