No Root SSH ACCESS on WP7702 FX30

How many modules are seeing this issue?

I think there are three possible solutions:

  1. contact Sierra FAE to get a tool to enable AT!PARTITION so that you can change the partition size of userapp patition and format this partition.
  2. if just happening to one particular module, ask the Sierra FAE to level-3 unlock the module and enable the AT!PARTITION command for you.
  3. write an unsandboxed legato application to format the userapp partition like this:

If you cannot download the legato application to the module due to SSH problem, you might need to upload the application to AVMS and ask module to connect to it by AT+WDSS=1,1 command.

BTW, you can also run wireshark on linux PC to see why there is connection refuse.
Here says shutting down the firewall on module side can help: