1. Brand and model: Choosing well-known brands and models with good reputation can improve the quality and stability of mobile phones.

2. Operating system: According to personal preferences, choose operating systems such as iOS and Android, and the corresponding versions.

3. Price: According to your own budget, choose the price range that suits you.

4. Screen size and resolution: The larger the screen, the higher the resolution and the better the viewing effect.

5. Memory and storage space: The larger the memory and storage space, the faster the mobile phone runs and the better the user experience.

6. Camera: Choose a camera with high pixels and rich functions to take higher quality photos and videos.

7. Battery capacity: The larger the battery capacity, the longer the battery life and the more convenient it is to use.

8. Other functions and performances: such as processor, network connection, waterproof and other functions and performances can be selected according to personal needs and preferences.

To sum up, buying a mobile phone needs to consider many aspects, and choose according to your own needs and budget in order to buy a mobile phone that suits you.