4FFF N618
4FFF N618 is a discontinued electronic-book reader developed by an Indian Company, Condor Technology Associates, and based on a Linux platform. The device is sold under various brand names worldwide. Features. 4FFF N618 provides a 16 levels of grayscale SiPix touchscreen display for viewing digital content. Pages are turned using the buttons on the device. The N618 connects to the internet through an available Wi-Fi connections. Users can read books without a wireless connection: disconnecting the wireless connection can prolong the battery's charge for up to 29 days. Specifications. The Display is an electronic paper  touchscreen from SiPix with 800×600 pixels (4:3) on 6 inch (167 ppi density) and 16 levels of grayscale. Sold as. The device is sold worldwide under various brand names. Across Europe available as: Modification. Being that the hardware utilizes Linux-based software it can be changed or improved to their heart's content. The firmware is labeled as “QT Software” and varies from vendor to vendor. The upgrade contains multiple image files with the extension of img, along with other system files. Flashing to upgrade the firmware can be taken advantage of as it does not seem to check if  the version that is being installed is older. Due to this, using firmware made by the other vendors on the model each sold in particular is possible. Dual-boot. The devices seem to contain a native dual-boot capability. When a device specific key combination is pressed during power-on any linux-kernel + ramdisk combination is booted from the sd-card.<ref name="oyo-hack/Booting"></ref>