Apple has not yet commented on the situation
Many iPhone 15 series users have reported that they are unable to make calls after updating to the latest iOS 17.2.1, as reported by Mydrivers.
iPhone owners have been posting about this on social media as well as the official Apple community, and currently this problem only exists on the latest iPhone models.
According to reviews from users of the iPhone 15 series, after updating to iOS 17.2.1 it is not possible to connect to cellular operator networks, as a result of which it is impossible to make calls or use the mobile Internet.
Apple has not yet responded to this question. According to some users, some cellular users have contacted their service providers and changed their SIM cards, but the problem could not be resolved.
Before this, some iPhone users said that after updating to iOS 17.2.1 their phones began to get very hot, to which Apple also did not respond.