The Xteink S4 is a small, lightweight e reader that runs Android and magnetically attaches to the back of your smartphone. It’s currently available for pre order in China for around $50, with an international release expected in the coming months via NotebookCheck The biggest change with the S4 is the operating system. Earlier Xteink models like the X3 and X4 ran a proprietary OS, which limited what you could do with them. The S4 runs Android 11 , which is outdated, but it opens the door...
