we have received feedback from several users that they have difficulties to pair Ticwatch to iPhone after updating to iOS11. Since this is a beta version, the pairing issue might be caused by some fundamental changes from Apple in terms of data transfer function. Currently, we are analyzing this issue and will need some time to find the root cause. Before further notice, we would not recommend you to update to iOS 11 beta from a risk perspective.
Any help will be apprecited.
I didn't find the right solution from the Internet.