https://devzone.nordicsemi.com/f/nordic-q-a/15163/inconsistent-behaviour-nrf51822Hi I am using Bluetooth Gatt to read/write, discover services from nRF51822 device. But the behaviour is quiet unpredicatable. I am testing on KIT_KAT 4.4. Sometimes there are no services discovered, sometimes there is Service but no characteristic founden-USTelligent Community 13Fri, 15 Jul 2016 10:46:43 GMThttps://devzone.nordicsemi.com/thread/57896?ContentTypeID=1Fri, 15 Jul 2016 10:46:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ade2711d-e700-48d5-ae17-8ff6b45e9031Hung Bui<p>Hi Samra,</p> <p>Which central device you were testing with ? We experienced this kind of behaviour with Android 4.3 and 4.4. Things got better with Android 5 and later. I would suggest you to test with our nRF Master Control Panel app. And also to test with a phone running more recent Android version.</p> <p>Note that in many case the phone will just cache the attribute table and don&#39;t do service discovery.</p><div style="clear:both;"></div>