@Elizar Thanks for your answer 😁 Hopefully, I have not bricked the modem but I think you are right and I have unfortunately bricked it ... I have contacted Pycom support to know if they have a way to repair it. If not, then I will probably just buy a new one. Thanks again 😉.

@kjm To check whether the LTE sim card is deactivated or not you need to contact the service provider.

@robert-hh Unfortunately I don't have an sd card to try updating it that way. Here's my output when I run the update with debug set to True. >>> sqnsupgrade.run('/dev/ttyUSB0', 'NB1-41019.dup', debug=True) <<< Welcome to the SQN3330 firmware updater [1.2.5] >>> File NB1-41019.dup has size 5835531 mirror? False recover? False resume? False direct? False atneg_only? False bootrom? False load_fff? True baudrate: 921600 target_baudrate: 921600 Setting port /dev/ttyUSB0 Setting baudrate to 921600 Initial prepartion complete... Loading NB1-41019.dup Firmware file is too big to load via FFF method. Using ON_THE_FLY Attempting AT wakeup... [921600] b'\r\nOK\r\n' AT+BIND=AT returned b'\r\nOK\r\n' ATE0 returned b'\r\nOK\r\n' Entering upgrade mode... Sending AT+SMLOG? AT+SMLOG? returned b'\r\n+SMLOG: LOG_INHERIT\r\nOK\r\n' AT+SMOD? returned 2 Sending AT+FSRDFILE="/fs/crashdump" AT+FSRDFILE="/fs/crashdump" returned b'\r\n\x00\x00/V\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x01\x00\x00\x00\x02\x00\x00\x0055.1.1.0 [33080] by robot-soft at 2017-10-27 07:49:11\x00\x00\x00\x00\x04\x00\x00\x03\xa8Assertion fai' AT+SQNSUPGRADENTF="started" returned b"ed\nFile: l1DspReset.c@96\n'LPU RIP: 00000000 00000003 00000000 (s->state ==ZSP_STATE_RUN || s->state "

Are there any release notes for the new sequans firmware? Any indication of feature changes or bug fixes?

@steve-williams , I did some power mesurements here on the same setup I mentioned in my previous post to give you a clear picture about the current consumption while the modem is trying to attach so as to help you identifying the problem , in first trial I intentionally powered off the CAT-M1 network in office and run a script on GPY trying to attach [image: 1551268955784-screenshot-2019-02-27-at-12.57.44-resized.png] you can see that the modem current consumption increases after sending attach request and keep trying to attach periodically, you can see that the Avg.current consumption when trying to attach can reach 285mA (150mA more than normal). The following image is when CAT-M1 network is back online and attaching is successful : [image: 1551269393957-screenshot-2019-02-27-at-13.09.22-resized.png]

@arneme Yup. Thats Correct.