https://devzone.nordicsemi.com/f/nordic-q-a/80352/nb-iot-frequency-bandsMorning, We have a technical question please. As far as we know the NB-IOT services in Germany should use only Band 20 for operation, but we see in our lab tests that some transmission occurs in Band 8. Would you please clarify this point to us. Thisen-USTelligent Community 13Mon, 11 Oct 2021 10:47:25 GMThttps://devzone.nordicsemi.com/thread/333450?ContentTypeID=1Mon, 11 Oct 2021 10:47:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6a089589-42ce-4091-a6a1-42a20eb44a8bHeidi<p>Hi!</p> <p></p> <p>Have you confirmed with your network provider that NB-IoT only operates on band 20 in Germany?</p> <p>I found this article (<a href="https://www.gsma.com/iot/mobile-iot-pilots-operator/deutsche-telekom/">https://www.gsma.com/iot/mobile-iot-pilots-operator/deutsche-telekom/</a>) stating that Deutsche Telekom rolls out NB-IoT on both band 8 and band 20.</p> <p></p> <p>You can use <a href="https://infocenter.nordicsemi.com/topic/ref_at_commands/REF/at_commands/mob_termination_ctrl_status/xbandlock_set.html">%XBANDLOCK</a>&nbsp;to lock the bands that the device operates on, if this interference is an issue.</p> <p></p> <p></p> <p>Best regards,</p> <p>Heidi</p><div style="clear:both;"></div>