https://devzone.nordicsemi.com/f/nordic-q-a/55989/frequent-disconnect-from-iphone-7Hello, We have developed an nRF52840 based peripheral which works fine with Android. The SDK version is 16.0.0 and soft device version 7.0.1. It works fine with iPhone as well except iPhone 7/7+ . We are unable to locate where the problem is. The sameen-USTelligent Community 13Fri, 27 Dec 2019 13:36:31 GMThttps://devzone.nordicsemi.com/thread/226933?ContentTypeID=1Fri, 27 Dec 2019 13:36:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d4a5325d-088c-4719-9658-5862dcc5c714Vidar Berg<p>Hello,</p> <p>I have not been able to replicate this with my iPhone 7 running iOS 13.3.0. I ran the ble_app_hrs example from SDK 16.0.0 on a 52840 DK. But you can try to increase the clock tolerance (NRF_SDH_CLOCK_LF_ACCURACY option in sdk_config) to 500 ppm, which is the most you can have for BLE, and see if it makes any difference. This setting will make the stacks account for a higher clock drift on the slow clock (ie. increase RADIO RX windows).</p><div style="clear:both;"></div>