Which brand of mobile phone is better?

The mainstream is apple. Ios system has a large number of applications and runs smoothly.

Followed by Android, mainly Samsung, Android is an open source system with many applications. As long as you can find the application you want, the security is not as good as that of ios, and the background tasks will get stuck if they are opened too much or used for a long time.

Finally, Nokia, mainly WP8 system. The system is smooth but has few applications, but it is basically enough. If you use Alipay or various banks, it will be a bit pitted. Alipay has an old version, and some banks do not support mobile banking. But I think the safety is the highest. You can remotely restore your mobile phone with your Microsoft account, without worrying about personal privacy exposure after your mobile phone is lost.