There were several ways to switch back to reading mode: Turn off the phone screen: press the power button on the side or top of the phone until the phone screen goes off. This will turn off the phone and return it to reading mode. 2 Turn on reading mode: Press the power button on the side or top of the phone until the phone screen lights up and then turn on reading mode. 3 Change the reading mode setting: Find the reading mode setting in the phone settings and set it according to your needs. Different cell phone brands and models may have different methods, so it is recommended to check the phone settings first.