The phone I am using is the iPhone 11. I bought it early last year. Even though two years have passed, it still runs well. Actually, I have used Android phones before, and some of them worked well for me, such as the XiaoMi 6, which was much cheaper than an iPhone. For me, the key to iPhones is its nicely designed operating system iOS. Nowadays, iOS-related systems are running on a wide range of devices, such as the iPhone, iPad, Apple Watch, and Apple TV. All the devices can collaborate with each other, and provide an immersive user experience. For example, when my iPhone and Macbook are logged into the same user account, the Macbook will receive the calls and messages through the iPhone and that's really convenient when I am working on Macbook, which means I will not be distracted by checking the phone. And they share the same clipboard which really helps me while copying some text to another device. Besides, there are many other details that I appreciate a lot. But more than that, I can not do these well on Android phones. Apparently, Android systems have their advantages too, mainly due to their openness. As is well known, Android originated from Google, but everyone can modify it on demand. Therefore some enterprises like XiaoMi are able to react quickly to users' feedback like MIUI let us open the same app simultaneously hence we can open two WeChat with two user accounts. And there are some other features that iOS lacks. On the other hand, this openness also makes every kind of Android device not able to work well together sometimes. In conclusion, compared with iOS, Android is a bit complicated and difficult to use, that's why I prefer iOS to Android.