The new software, which requires either an Apple developer account or beta program membership in order to access, paves the way for features like WiFi Calling on the iPhone across more
carriers, as well as smarter
switching of WiFi and
cellular data for faster browsing, while on the smartwatch there's a new Time - Lapse face among other tweaks.
That has a global 4G LTE modem, promising
carrier support in more than 140 countries and regions, along with Apple SIM to make
switching cellular data plans more straightforward.