https://www.theverge.com/2018/10/29/18040034/apple-ios-12-1-release-date-october-30-features-group-facetime-beautygate

Ahead of its big iPad Pro and Mac event, Apple just announced that iOS 12.1 will be released tomorrow. It’s the first significant update to iOS 12 and includes the Group FaceTime feature that was removed from the initial release. Group FaceTime allows you to video chat with up to 32 people simultaneously and supports stickers, video filters, and Animoji/Memoji. The feature was held back from iOS 12.0, but apparently it’s now ready to go. The video bubble for each person gets larger whenever they speak on the call.

iOS 12.1 also adds dual-SIM support for iPhone XS and XR, so you’ll be able to have two lines running on the same phone. One line will use your physical SIM card, with the other working through eSIM technology. (Apple put up a helpful tutorial for enabling dual SIM functionality.)