https://devzone.nordicsemi.com/f/nordic-q-a/24659/ancs-bonding-resetHi When I used ANCS, there is &quot;bluetooth pairing request&quot; notice shown on the iphone, if choose cancel, then 51822 went to reset, why is that happen? iOS:10.3.3 NRF51822 SDK:10 Softdevice:S110 8.0.0en-USTelligent Community 13Fri, 25 Aug 2017 07:57:33 GMThttps://devzone.nordicsemi.com/thread/97065?ContentTypeID=1Fri, 25 Aug 2017 07:57:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:62da6c04-8f89-4434-b865-3475f1ab7f7brun_ar<p>I assume that would generate an error code that isn&#39;t handled so the application is forwarded to the error handler. Regarless i would recommend using the latest SDK and SD version for the nRF51822 as there are several updates to the ANCS example in SDK 12.</p><div style="clear:both;"></div>