Be warned: You need to enter a valid phone number. They will call you asking on what you plan on building with the software. I've had that happen to me within a few days of downloading the software.
I use Google Voice for that. I don’t have it tied to my phone, so the only thing they can do is send me text messages that I only see when I’m expecting something.
Another person had the same experience. https://news.ycombinator.com/item?id=24582890