https://devzone.nordicsemi.com/f/nordic-q-a/44953/changing-service-names-and-characteristic-namesSDK 15.2 API6.1 I am using the ble_app_blinky and ble_app_blinky_c examples and when i connect I see the &quot;Nordic LED Button Service&quot; and inside that i see 2 chracteristics &quot;Button&quot; and &quot;LED&quot;. I modified the code a little to add another characteristicen-USTelligent Community 13Wed, 20 Mar 2019 14:47:07 GMThttps://devzone.nordicsemi.com/thread/177390?ContentTypeID=1Wed, 20 Mar 2019 14:47:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3d055f40-179b-45a9-8b02-ee5bd40d708bBj&#248;rn Kvaale<p>Yes, it seems so. The phone app does not have the custom service name in its database, which is why it uses unknown service instead.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/176762?ContentTypeID=1Mon, 18 Mar 2019 14:46:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dfe6db08-0a60-49ad-8dd1-8aac6601c710dmleone<p>So the display on the app is a result of the phone app itself and not necessarily the info stored within the bluetooth packet?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/176747?ContentTypeID=1Mon, 18 Mar 2019 14:17:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b5859453-5fb0-442b-bc83-f67afb4af181Bj&#248;rn Kvaale<p>From what I can see, it does not seem this is that easy to do (<a href="https://devzone.nordicsemi.com/f/nordic-q-a/9418/how-to-change-the-service-name">link 1</a>, <a href="https://devzone.nordicsemi.com/f/nordic-q-a/54/how-add-a-name-to-a-custom-service">link 2</a>). It seems that the reason the service is unknown from the smartphone side (nRF Connect for Mobile) is that the UUID is not defined in the database. Service UUIDs that the smartphone app has in it&#39;s database (such as predefined Bluetooth SIG names) will show the service name, but custom services will show &quot;Unknown Service&quot; (<a href="https://github.com/bjornspockeli/custom_ble_service_example">link</a>).</p><div style="clear:both;"></div>