Although the appearance of the iPhone 7 and 7 Plus has not changed much, and the problems of the white belt and the protruding camera have not been solved, they may support dual card and dual standby. This is a function that many users who hold several mobile phone cards have been waiting for years.

Recently, the U.S. Patent and Trademark Office announced an Apple patent application, which shows that an iPhone with two SIM cards can receive the call information of the second SIM card when the first SIM is calling. However, this is probably just an ordinary dual card dual standby, which does not have the dual pass function (that is, when two cards are talking at the same time, card 1 can call card 2). The special point of this patent is that when card 1 is talking, the number of card 2 can be automatically recorded in the form of missed calls (the most basic single pass mobile phone, when one card is talking, the other card will be disconnected).

Although the function is not very strong, it indicates that Apple is also considering dual card support in mobile phones.