The reading mode of a Huawei mobile phone usually referred to the function used when reading e-books. Specifically, the Huawei smartphone can be activated in reading mode through the following steps: 1 Open the e-book file you want to read and choose how to open it. 2. Scroll down from the opened e-book file to see the "Reading Mode" option. 3 Choose "Reading Mode" and click the open button to start reading mode. In reading mode, the phone would shrink the font size and background color to improve reading comfort. At the same time, the reading mode could also automatically bookmark, the background light was always on, and other functions to make reading more convenient and efficient.