Here's an up close and personal look at the hottest Android phone in the world right now

Millions of people have already signed up to purchase the OnePlus 2, the sequel to last year's most exciting Android phone, which you can only purchase if you receive an invite from the company.

The Chinese startup OnePlus unveiled the new phone in July, and sold out 30,000 units of the OnePlus 2 to Chinese customers in just 64 seconds. (The first round of invitation-related sales will begin on August 11.)

Last year's OnePlus One was special because it offered a big, powerful, premium phone that cost less than half the price of an unlocked iPhone. It was also loved by critics. And since quantities were limited from the start, demand skyrocketed as a result.

OnePlus hopes to keep its positive momentum going with this year's model. Here we break down all the features of the OnePlus 2 to give you an idea of why people are so excited about this phone.