The Moto X4 is Lenovo’s latest offering to the Android One lineup of devices; intended to bring current hardware and software to the affordable smartphone market. The device is now available for pre-order in the U.S. through Google’s Project Fi service, selling for $399.

Google has not detailed an exact release date for the smartphone but is also promoting its new trade-in program, which will allow subscribers to get up to $165 when turning in select Nexus devices. Google is also offering a $50 Project Fi credit to those who preorder the Android One Moto X4 by Oct. 5.

Lenovo unveiled the Moto X4 in at IFA in early September, highlighting its Amazon Alexa compatibility and its dual camera set up among top features. So far, the Moto X4 is the only Android One device compatible with Project Fi, but there are many other smartphones that can be used on Google’s MVNO network. Check out the lineup. 

Pixel/Pixel XL 2

The Google Pixel and Google Pixel 2 XL will likely be announced Oct. 4 and are expected to be the next smartphones compatible with Project Fi. Many features remain under wraps, but the devices may include the Qualcomm Snapdragon 835 chip and 64GB and 128GB internal storage options. The Pixel 2 XL 64GB model is expected to sell for $849 and the 128GB model for $949.

Pixel/Pixel XL

The original Pixel and Pixel XL are Google’s current smartphone offerings and are known for their powerful cameras and native compatibility with Google’s Daydream VR protocol. The Pixel starts at $649 and the Pixel XL at $769, but their prices are likely to drop once the Pixel 2 and Pixel 2 XL are announced.

Nexus 5X/Nexus 6P

The Nexus 5X and Nexus 6P are Google’s 2015 device offerings. The devices are no older on sale through Google and are out of stock at the Project Fi website, but they remain compatible with Project Fi. Subscribers who already own a Nexus 5X or Nexus 6P or purchase the smartphones from a different vendor can bring them to the network. Reports indicate Google will continue to provide software support for its last Nexus smartphones until September 2018. This means the devices could also remain compatible with Project Fi until then.