https://devzone.nordicsemi.com/f/nordic-q-a/24227/device-disconnects-after-foget-device-from-ancs-serverHi, I am using &quot;nrf5 sdk v11.0&quot; ble_peripheral &quot;ble_ancs_c&quot; example for nrf52_DK(PCA10040) . When i connect to the my ios device then accepted pairing request then i am able to get the notification from ios ANCS server . But when i do forget deviceen-USTelligent Community 13Mon, 14 Aug 2017 10:52:53 GMThttps://devzone.nordicsemi.com/thread/95396?ContentTypeID=1Mon, 14 Aug 2017 10:52:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:98fc233e-1a58-4932-a5ff-1935c8a80091run_ar<p>When you delete the bond information in iOS you should also do so on the peripheral. If you only delete it on the iOS side I don&#39;t think you will be able to create a new bond. That is you will get an event PM_EVT_CONN_SEC_CONFIG_REQ, by default this will not be handled and the new bond will be rejected. This is the default behavior as you don&#39;t know if the device trying to bond is the same as the known device (using the IRK to authenticate the peer is not safe, as it&#39;s very easy for an attacker to use the same address as the known device)</p><div style="clear:both;"></div>