https://devzone.nordicsemi.com/f/nordic-q-a/2205/ios-nrf-uart-skd-5-2I have compiled the ble_app_uart sdk the nRF51 SDK_v5.2.0.39364. (see attached file) and I upload this app to my device using OTA . I found it can work with my Android device but not the iOS device. I use nRF UART app on both android and iOS deviceen-USTelligent Community 13Thu, 05 Jun 2014 09:14:32 GMThttps://devzone.nordicsemi.com/thread/9321?ContentTypeID=1Thu, 05 Jun 2014 09:14:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9438a852-9957-43b8-8eba-ef27c06bb389Powen Ko<p>I have same problem,too</p> <p>#. nRF UART_1_0_1 #. SDK_v5.2.0.3964 \ ble_app_uart #. ipad mini renita iOS 7.0.2</p> <p>so far My case only working good on below #. nRF UART_1_0_1 #. dk_v4_3_0_27417 \ ble_app_uart #. ipad mini renita iOS 7.0.2</p><div style="clear:both;"></div>