Very nice smartwatch at this point range. It is recommended to read manual before using this watch.
After using for almost a week now, my review is here:
1_ There are two ways to connect smartwatch with phone.
You need to just open Bluetooth on your phone and not on smartwatch, only if you want to sync notifications, zeberonics app data sync, and even can cancel calls.
Next when you turn on Bluetooth from smartwatch, then you can make calls which is a great experience.
In first mode battery life will be much better (around 7 days) than the second mode (depends on how much time you make calls via Bluetooth), as expected.