I’m currently facing an issue with some of our modules where for some unknown reason, the PDP context refuses to properly save to non-volatile memory.
Additionally, an internal error (CME: 60) will occur with the AT+WPPP? command until I reconfigure some aspects of the context as shown below. On bootup the context will be default to only one defined context and I have to manually re-define a second one for the wppp command to work again.
Unfortunately after a reboot all of those settings are gone including context and apn’s that were defined and the device is then back to the same issue as before.
I don’t know what causes this issue, but once it is triggered it is very consistent. I’ve tried resetting to factory settings and loading other profiles but no luck. I now have a few modules showing this issue both on firmware version 220.127.116.11 and 18.104.22.168.
If you have any recommendations I would be happy to troubleshoot it to figure out a solution to this.