I just opened an old project onbjectif-c created in 2010, the application works correctly except an interface is not working.The error is -canOpenURL: failed for URL: "tel: 0" - error: "This app is not allowed to query for scheme tel".
according to my research I find that the error is related to ios 9 but I do not find how to resolve it thank you
This means you have to add the scheme 'tel' in your info.plist, i.e
This will whitelist the scheme 'tel'