When using a mobile phone to read e-books, it was usually connected to the Internet through Wi-Fi or mobile data. When connected to the Internet via Wi-Fi, you can access the online e-book store through the mobile phone browser to download and read your favorite e-book. Through the mobile data connection, you can download the e-book directly from the mobile app store or online e-book store and use the built-in reading application of the mobile phone to open the e-book for reading. Therefore, when he used his phone to read e-books, he was connected to the Internet.