Can Apple's Book Master only listen to books on Wi-Fi? 4G can only listen to girls, Wi-Fi can switch to boys. What was going on?

Apple Book Master is an online book listening application that can connect to the Internet through Wi-Fi or 4G network to listen to the audio content of the novel online. It supports two reading modes:Wi-Fi mode and 4G mode. In Wi-Fi mode, Apple Book Search Master could use the wireless network to connect to the Internet and listen to the audio content in the novel directly on the device. In 4G mode, Apple Book Search Master needed to connect to the mobile network to listen to the audio content of the novel on the mobile data connection. It should be noted that the listening mode supported by Apple Search Master is single-threaded, which means that you can only listen to the audio content in one mode and cannot switch modes. If you could only listen to girls 'voices when using Apple Book Search Master in Wi-Fi mode and switch to boys' voices in 4G mode, it might be because the device's listening mode was set to girls 'voices. If you want to switch to a male voice, you need to switch back to a male voice in the device's settings.