https://devzone.nordicsemi.com/f/nordic-q-a/80984/uart-framing-error-when-connect-thingy91---not-able-to-enter-mcuboot-modeHello: I had the Thingy91 (nrf9160) configured and working, but after a while, I tried to test it again, and I started seeing these errors: - When using the LTE Link Monitor, it throws the UART FRAMING ERROR, and no further operation is possible,en-USTelligent Community 13Mon, 25 Oct 2021 12:16:38 GMThttps://devzone.nordicsemi.com/thread/335736?ContentTypeID=1Mon, 25 Oct 2021 12:16:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b5f2d2b7-6dfe-4389-b21f-caa8ad70fe8dSimonr<p>Hi Gus</p> <p>Have you done what the LTE Link Monitor prompts you to do, to check that the baud rate is correct?</p> <p>I&#39;m sorry, but if you have deleted the bootloader or necessary data on your Thingy:91 you will need a debugger in order to recover it, and I&#39;d recommend to try that to make sure. In general the Thingy:91 by itself is not great for development exactly because you need a debugger to program it and potentially recover it.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>