Found new evidence.
In the future iPhone will come with support for two SIM-cards. This proves the code found in the fifth beta version of iOS 12. His first noticed developed by Guilherme Rambo.
In a component firmware that is responsible for creating diagnostic reports, there are two new options: secondSimStatus and secondSimTrayStatus. Judging by the names, they define the status of second SIM card and a performance slot for her.
In another component of the firmware developer also found a string with the name of isDualSimDevice. Probably, it helps the operating system to understand whether a particular model of iPhone two SIM-cards.
Earlier this year, Bloomberg analysts saidthat the slot for two SIM-cards can get a new 6.5-inch iPhone 11 Plus with an OLED display. Option is useful for people who travel a lot, have a separate work phone number or use the services of one operator for calls and another for gaining access to the Internet. Note that in iOS 12 found no mention of specific models with support of two SIM-cards.
Apple will introduce an updated line of iPhone in early September. The start of sales is scheduled for the second half of the month, but iPhone 9 with a 6.1-inch LCD can get in the stores in November.