https://devzone.nordicsemi.com/f/nordic-q-a/4149/xcode-invalidate-the-ble-app-because-of-udid-is-used-somewhere-in-the-codeI used nRF_Demo_Utility ios app and WFConnector.framework in a sample testing app im building. And when I tried to archive it using xcode it invalidates it with a error message about UDID (apps are not permitted to access the udid and must not use theen-USTelligent Community 13Sun, 19 Oct 2014 01:05:21 GMThttps://devzone.nordicsemi.com/thread/14840?ContentTypeID=1Sun, 19 Oct 2014 01:05:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e2fed9ac-3ae4-4630-abda-434fb147eb8eRK<p>Not really a Nordic question at all. Apple deprecated the use of UDID back in iOS5 and since iOS7 disallowed apps from using it completely. There&#39;s plenty of documentation on the Apple site about the proper way to get device identifiers depending on what exactly you&#39;re trying to do. identifierForVendor is the most direct replacement.</p> <p>If it&#39;s in your code, change it, if it&#39;s in WFConnector (whatever that is) get a newer version from wherever you downloaded that from (5 seconds on google tells me the author removed that call in V 3.0 which was ages ago).</p><div style="clear:both;"></div>