https://devzone.nordicsemi.com/f/nordic-q-a/90671/what-are-the-differences-between-cfun-0-and-cfun-4Dear All, I am working on an application where I am connecting to the network, sending some data and then disconnect using CFUN=4, in order to achieve low power for my application. This seems to work pretty well in most cases. But if my device exceedsen-USTelligent Community 13Tue, 09 Aug 2022 11:25:47 GMThttps://devzone.nordicsemi.com/thread/380817?ContentTypeID=1Tue, 09 Aug 2022 11:25:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:01300339-5fec-4b0c-9a1a-f4f150b4185fCharlie<p><span>Hi&nbsp;Anastasopoulos,</span></p> <p><span>There are no differences in searches done after CFUN=0 or CFUN=4 followed by CFUN=1, the only difference is that&nbsp;CFUN=4 doesn&#39;t perform modem de-initialization.</span></p> <p><span>If the network is forbidden, i.e. certain reject cause has been received from the network, then it will be ignored in the following network selections.</span></p> <p><span>Best regards,</span></p> <p><span>Charlie</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/380131?ContentTypeID=1Thu, 04 Aug 2022 12:57:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ad3a04f3-56dc-4698-868c-e198c942a73bCharlie<p>Hi&nbsp;Anastasopoulos,</p> <p>I assume you have read the <a href="https://infocenter.nordicsemi.com/topic/ref_at_commands/REF/at_commands/mob_termination_ctrl_status/cfun_set.html">+CFUN</a> document about the difference between CFUN setting 0 and 4. I will not add the description here.</p> <p>About your observation, I do not have an explanation by far, need to check with our modem firmware development team for details. I will come back to you later.</p> <p>Best regards,</p> <p>Charlie</p><div style="clear:both;"></div>