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Less than 1000<br />
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Problem resolved after update to latest iOS.
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Have new iPhone # - how to I create list (single group) of all iPhone Contacts which can be used as To: in Messages App?<br />
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Want to inform all [Contacts] list members of new #.
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Have new iPhone # - how to I create list (single group) of all iPhone Contacts which can be used as To: in Messages App?

Want to inform all [Contacts] list members of new #.

Create group list of contacts with OS 11.2

Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers. For large systems, the operating system makes sure that different programs and users running at the same time do not interfere with each other. The operating system is also responsible for security, ensuring that unauthorized users do not access the system. Operating systems provide a software platform on top of which other programs, called application programs, can run.

Operating Systems

The iPhone is a smartphone made by Apple Inc. It and the iPad, along with several other mobile devices from Apple, run on the iOS operating system, which has its own topic, as does the iPad for device-specific questions. Native iOS applications are written in Objective-C or in Swift using the Cocoa Touch frameworks or HTML5 compiled with the help of a package manager such as Adobe PhoneGap; a common IDE is Xcode.