Amazon doesn’t plan to unveil its first smartphone until later this spring, but the world got an early look at the handset last week when BGR posted exclusive photos of the unannounced device. We also shared several key details about the phone’s software, which features unique hardware-assisted 3D effects that will help differentiate Amazon’s smartphone lineup from rival devices. But Amazon’s 3D effects are just the tip of the iceberg. ★Don’t miss our earlier coverage, which included several exclusive photos of Amazon’s first smartphone★ BGR has exclusively learned several additional details about the heavily customized Android software that powers Amazon’s smartphone. Multiple trusted sources tell us that Amazon’s upcoming handset will utilize a unique combination of cameras, sensors and software to dramatically change