https://devzone.nordicsemi.com/f/nordic-q-a/1782/nrf51822-and-ancsI have some question about ANCS ,when trun off/on bluetooth function on ios device ,or rebooting iOS Device ,ANCS does not work.i program ANCS example again,and then ,reconnect the ios device ,ANCS can not work normally as well, ANCS can work normallyen-USTelligent Community 13Tue, 04 Mar 2014 16:21:08 GMThttps://devzone.nordicsemi.com/thread/7802?ContentTypeID=1Tue, 04 Mar 2014 16:21:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0e64484c-a833-4293-9509-293051a74f55Ole Morten<p>This has already been discussed at length <a href="https://devzone.nordicsemi.com/index.php/ancs-sample-doesn-t-work-after-rebooting-ios-device">here</a>, so please take a look at it. In summary, you must rewrite the CCCDs after Bluetooth has been turned off/on, since iOS seems to forget them on its own.</p> <p>Also, if you do an erase all on the nRF51 side, bonding information will be lost, and in this case, you must manually delete bond information also from the phone to make things work again. This is done by selecting the device from Settings, Bluetooth and choosing &quot;Forget this device&quot;.</p><div style="clear:both;"></div>