https://devzone.nordicsemi.com/f/nordic-q-a/3840/security-getting-tiggeredI am using the ble_app_uart code from SDK 6.0 on my custom PCB with a nrf51822. I am comparing it&#39;s functionality with a PCA10004. Both are running the exact same code. I&#39;m also using both the Master Control Panel and an iphone 5S (running nrf UART) toen-USTelligent Community 13Thu, 09 Oct 2014 11:38:27 GMThttps://devzone.nordicsemi.com/thread/13855?ContentTypeID=1Thu, 09 Oct 2014 11:38:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6e5d9458-ea2e-413c-b338-759c0256fe83Petter Myhre<p>Thank you for answering your own question.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/13854?ContentTypeID=1Fri, 19 Sep 2014 16:17:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9f55eea9-9915-49e6-a5f9-cbc253c150edZach<p>Nordic support figured it out and I though I would post here for any future searches... Turns out that my custom board was showing up under paired devices on my iphone (Settings-&gt;Bluetooth-&gt;Devices). I assume this is because it bonded with it. So even though I disabled bonding on the nrf51822 side, the phone still had bonding info for this device and was asking for security info, which triggered the problem.</p><div style="clear:both;"></div>