How to add music to the Apple mobile phone library:

Music player Find and open the music player on the phone's home page. After finding Add Music, click Browse, select a music to play or search for a music to add. Click on the three dots logo. After playing, find and click on the three dots logo in the lower right corner. To add music, click Add to Library in the pop-up menu.

iPhone 4 is available in white and black colors; the front and rear bodies are made of aluminosilicate glass, which is 30 times harder than plastic, making it more scratch-resistant and durable. Both the front and rear glass surfaces have a grease-resistant coating to keep things clean and tidy, while surrounding the iPhone 4's exterior is a stainless steel band forged from a custom alloy that's five times stronger than standard steel.

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Since the iPhone 4 (including), the iPhone series models have been equipped with Apple Silicon self-developed chips, which integrate the processor core, GPU core, IO core and memory controller . The mute button of iPhone series products is on the left side of the front of the device. It is a physical function switch designed for iPhone, allowing users to quickly switch between mute and ringtone.

iPhone 6s and iPhone 6s Plus add 3D Touch pressure-sensitive touch to the screen for the first time. Compared with multi-touch operations in a flat two-dimensional space, 3D Touch technology increases the perception of force and finger area. , you can quickly preview and view text messages, pictures, hyperlinks and other content by long pressing. Make the original more flat operation become more three-dimensional.