https://devzone.nordicsemi.com/f/nordic-q-a/25264/sdk13-1-ancs-bughello all： I think sdk13.1 s132 has a bug about ANCS， ANCS works normally only in the following two cases 1、Both the phone side and the device side do not remember each other&#39;s information; 2、Both the phone side and the device side rememberen-USTelligent Community 13Tue, 19 Sep 2017 01:40:36 GMThttps://devzone.nordicsemi.com/thread/99559?ContentTypeID=1Tue, 19 Sep 2017 01:40:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3d3edeb3-b404-40e3-a80c-6399d367c954rc766437<p>Ok,I am looking for a solution to this problem，if I forget the bond informaion from IOS side (device had remember the IOS info), connect in next time, devciece side will recieve an event PM_EVT_CONN_SEC_CONFIG_REQ, The default way to deal with this event is reject pairing request from an already bonded peer.</p> <p>pm_conn_sec_config_t conn_sec_config = {.allow_repairing = false}; pm_conn_sec_config_reply(p_evt-&gt;conn_handle, &amp;conn_sec_config);</p> <p>if you want to repair the IOS, you can do like this</p> <p>pm_conn_sec_config_t conn_sec_config = {.allow_repairing = true}; pm_conn_sec_config_reply(p_evt-&gt;conn_handle, &amp;conn_sec_config);</p> <p>it can work normal.</p><div style="clear:both;"></div>