https://devzone.nordicsemi.com/f/nordic-q-a/21910/hid-telephony-usageHi, I want to add functions of HID telephony to pickup/decline phone on nrf51822 application. But it seems telephony usage did not work on android/ios phone, or incorrect telephony usage were sent. Could you please help to provide one example ofen-USTelligent Community 13Fri, 12 May 2017 13:51:19 GMThttps://devzone.nordicsemi.com/thread/86030?ContentTypeID=1Fri, 12 May 2017 13:51:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:23defb76-29ae-4822-924f-35ca25fd0d91run_ar<p>I don&#39;t know. Are you sure you are sending the correct commands? And is useing a correctly configured report map? Maybe the IOHIDUsageTables from <a href="https://opensource.apple.com/source/IOHIDFamily/IOHIDFamily-247/IOHIDFamily/">this</a> page can be helpfull?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/86032?ContentTypeID=1Wed, 10 May 2017 12:12:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:01822f21-5578-45e4-97b9-8b1d51390879JamesPan<p>thank you, I want to send Hook Switch like pushing button on wired headset to pickup/pud down a incoming call. I will try ANCS on iOS.</p> <p>Android and iOS did not implement Telephony HID usage over GATT?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/86031?ContentTypeID=1Wed, 10 May 2017 09:31:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c17abf20-7913-43c2-9173-9c0062dfd6d1run_ar<p>Which call controls are you testing with? Hook Switch, flash and drop? If it doesn&#39;t work I guess they are probably not supported.</p> <p>On iOS you could use ANCS and perform a notification action based to pickup/put down the phone. It might also be an idea to check the accessory user interface specification.</p><div style="clear:both;"></div>