Why nRf51822 is not connecting to my mobile having 4.0 bluetooth ? BUT only connect when i use Official apphttps://devzone.nordicsemi.com/f/nordic-q-a/15884/why-nrf51822-is-not-connecting-to-my-mobile-having-4-0-bluetooth-but-only-connect-when-i-use-official-appMy phone : Lenovo Phab Problem : cannot pair with nRf 51822 from Bluetooth menu BUT when i use Official App ( NRF Utility etc) then connect and start receiving data &quot; Notification on pairing request : incorrect pass key ( it didnt prompt for a passkeyen-USTelligent Community 13Wed, 07 Sep 2016 10:00:39 GMTRE: Why nRf51822 is not connecting to my mobile having 4.0 bluetooth ? BUT only connect when i use Official apphttps://devzone.nordicsemi.com/thread/60584?ContentTypeID=1Wed, 07 Sep 2016 10:00:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f42ebe75-5830-4f38-a6f1-58854d033186Roger Clark<p>I think the OP is confusing conventional Bluetooth with Bluetooth low energy</p><div style="clear:both;"></div>RE: Why nRf51822 is not connecting to my mobile having 4.0 bluetooth ? BUT only connect when i use Official apphttps://devzone.nordicsemi.com/thread/60583?ContentTypeID=1Mon, 22 Aug 2016 12:01:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7fbbe000-2b5a-4214-af3f-d959e63d8aedPetter Myhre<p>What application are you running on the nRF51?</p><div style="clear:both;"></div>