Siri vs. Cortana - Happy Anniversary (Commercial)

Siri vs. Cortana — Happy Anniversary (Commercial)

Say hello to Cortana, your new personal assistant. Cortana will remind you to leave early to beat traffic and help you get to your destination on time, will remind you that you need milk when passing the grocery store, and will remind you to say happy birthday when your mom calls. Available now on the new Nokia Lumia 635 and on other Lumia phones.
Learn more at http://www.windowsphone.com