Phone 6s is running iOS 11.1.1 (15B150), which may not be supported by this version of Xcode

Unable to test my ios app created using xcode on my iphone

Replies

Which version Xcode?

same problem, and my iMac did not reveive updates for Xcode , Two days laters, I open the download.developer.apple.com to check the Xcode version, I see the Xcode 9.1 ..... So I update It by myself.

Check this Stackoverflow post should help

This will help if somebody is facing similar issues with iOS 11.2 devices: https://stackoverflow.com/a/43098731/4820235