Can I make a phone call when upgrading the ios 15.4 telecom card?

Upgrade ios 15.4 telecom card to make calls.

On March 15, the official version of apple IOS 15.4 was officially launched. This is the fourth major version update since the release of IOS 15. The size of the installation package is about 1.28GB, which not only fixes some errors, but also brings brand-new and extremely practical functions to iPhone 12 and subsequent models.

Judging from the information pushed by IOS 15.4, the most important function is the function of "unlocking with mask". After upgrading IOS 12 and subsequent models, you can unlock it by face ID even if you wear a mask. This is indeed a very practical function for us under the haze of the epidemic, which allows us not to take off our masks before taking out our mobile phones to pay in public, thus reducing the risk of being infected by bacteria and viruses. Compared with the whole mobile phone industry, it is indeed a technological innovation. In addition, the update of IOS 15.4 also brings new "characters" and the function of synchronizing * * * sessions directly from supported applications.