Can't mi band short messages be stored?

Can mi band record and store data when the mobile phone is not around? What is the longest data that can be stored?

Xiaomi bracelet 2 can store data separately, so you don't have to carry a mobile phone when you go out for running or sleeping. When you need to synchronize data, just turn on the Bluetooth of your mobile phone and connect it near the bracelet.

The main body (rice grain) of Xiaomi bracelet 2 can retain sports data information for about 7 days at the longest.

The data that has been synchronized to Xiaomi Sports App will be automatically uploaded to the cloud storage. If you change a new mobile phone, you can synchronize the previous data from the cloud to the new mobile phone as long as you bind the previous Xiaomi account to the bracelet on the new mobile phone.