With recent cellular connectivity issues plaguing the iPhone 7 and the iPhone 7 Plus, iOS 10.0.3 may be the ultimate balm for this batch of bugs.
That update, exclusively for the two new iPhones, went out today. The update weighs in at 76MB and can be pulled through the usual download routes. No security updates were made beyond those included in the iOS 10.0.2 update.
Owners of the phones using them on AT&T, T-Mobile and Verizon have been reporting several issues with LTE connectivity.