Hot Hardware published a review on the Asus ZenFone 2 Sneak Peek With Lollipop And Intel Atom Z3580 Inside A quote from the article:

Back in early January, during our coverage of the Consumer Electronics Show, we gave you all a first glimpse of the Asus ZenFone 2. For those unfamiliar with the ZenFone 2, it is an Intel-powered smartphone, rocking Android Lollipop, that's compatible with AT&T and T-Mobile, and other cellular networks that utilize GSM technology, like Straight Talk, MetroPCS, and Cricket Wireless among others.

A couple of days ago, Asus held an event to officially launch the ZenFone 2 and announce availability in the U.S., and we left with one of the flagship versions of the phone in-hand...

 Asus ZenFone 2 Sneak Peek With Lollipop And Intel Atom Z3580 Inside @ HotHardware.com