https://devzone.nordicsemi.com/f/nordic-q-a/55857/unable-to-connect-to-verizon-using-hologram-sim-after-upgrading-mfw-to-v1-1-0Similar to this ticket , we are no longer able to connect to Verizon using a Hologram SIM after upgrading modem firmware from 1.0.1 to 1.1.0. I&#39;m attaching a matching console log and modem trace showing a connection attempt using at_client.en-USTelligent Community 13Thu, 02 Jan 2020 12:34:09 GMThttps://devzone.nordicsemi.com/thread/227228?ContentTypeID=1Thu, 02 Jan 2020 12:34:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a324288e-43e3-42b5-9db5-e32360730e33Didrik Rokhaug<p>Hi.</p> <p>Have you heard back from Hologram?</p> <p>According to the log, the UE gets &quot;PLMN not allowed&quot; error during attach to the Verizon network. This means that the Hologram SIM does not allow roaming to Verizon.</p> <p>Best regards,</p> <p>Didrik</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/226621?ContentTypeID=1Fri, 20 Dec 2019 15:21:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d1a572a6-f053-4073-95de-6a8c549d755djbrzozoski<p>You are likely right.&nbsp; I tried jumping the modem back to firmware 1.0.1 to see if it corrected the issue and it doesn&#39;t.&nbsp; I think it was just coincidental that the first time I had tried this in over a month was right after upgrading firmware.&nbsp; I will contact Hologram.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/226447?ContentTypeID=1Thu, 19 Dec 2019 20:57:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2c65a843-3656-4611-882d-aa287d01c9ceRob C<p>Recommend you reach out to Hologram.&nbsp; There have been changes recently that affect roaming SIMs (like Hologram) from accessing Verizon towers (specifically CAT M1, I believe).&nbsp; We were impacted as well, beginning in late November 2019.</p><div style="clear:both;"></div>