https://devzone.nordicsemi.com/f/nordic-q-a/49374/nrf9160-delete-sample-from-boardHello, I have recently built and flashed CoAP Sample on my board. After that the device cannot connect to the mobile network. Could you please provide me a description how can I &quot;rollback&quot; or delete the flashed Sample from board. FW version: mfw_nrf9160_0en-USTelligent Community 13Thu, 04 Jul 2019 11:18:21 GMThttps://devzone.nordicsemi.com/thread/196513?ContentTypeID=1Thu, 04 Jul 2019 11:18:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8b09e027-6216-4d3a-93c7-a2359cda8de8OlgaS<p>Hi Martin,</p> <p>thank you for the very quick response.</p> <p>Best regards,</p> <p>Olga</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/196509?ContentTypeID=1Thu, 04 Jul 2019 11:11:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4ff549c3-aba8-4388-b022-8e9503b3d659Martin Lesund<p>Hi Olga,</p> <p>Please follow <a href="https://devzone.nordicsemi.com/f/nordic-q-a/49264/unable-to-update-firmware-on-nrf9160/196300#196300" rel="noopener noreferrer" target="_blank">the instructions I have posted in this thread.</a><br />This is to get&nbsp;up to date.</p> <p><strong>To delete what is on the nrf9160 SIP you have several options:</strong></p> <p>1. Command line: nrfjprog -e -f nrf91</p> <p>2. SES IDE:&nbsp; Target --&gt; Connect J-link --&gt; Erase All</p> <p>3. Programmer app (in nRF Connect For Desktop): Erase All button</p> <p></p> <p>Best Regards,</p> <p>Martin L.</p><div style="clear:both;"></div>