1, any brand of mobile phone can use mi band, but the system version must be above Android 4.3 and support Bluetooth 4.0. If the system version is Android 4.3, you can use some functions of mi band, which is perfectly supported by Android 4.4 or above. 2. The main functions of MiBand include checking the amount of exercise, monitoring the quality of sleep and waking up with an intelligent alarm clock. You can check the amount of exercise in real time through the mobile phone application, monitor the effect of walking and running, and identify more exercise through the cloud. Mi band can automatically judge whether to enter the sleep state, record deep sleep and shallow sleep respectively and summarize the sleep time, thus helping users to monitor their sleep quality. Mi band is equipped with low-power Bluetooth chip and acceleration sensor, which can stand by for 30 days. In addition, it supports IP67 waterproof and dustproof, which means that you don't need to take it off in your daily life, even in the shower.