Is there any way to deactivate permanently the IPv6 support for an U-Blox SARA-U201 because by default it includes dual stack IPv4/IPv6. The problem with this is that my french provider (Bouygues Telecom) only support IPv4 only so when we try to establish a DATA connection we get an error message while using a private APN (everyhting works fine with a standard APN). I can confirm that it is not a authentication issue as the session is not established so there is Nothing coming to our authentication server which has been confirmed by the Mobile Network Operator. You can find below the AT commands that we tried to no avail as you can see:
Thanks in advance.