I am trying to get an IPV6 connection working on my MR600 router in France. (For some odd reason this forum complains if I put the name of the provider!) 

It is working OK when I select IPV4 as the PDP Type, and it continues to work (but IPV4 only) when I set PDP Type to IPV4 & IPV6.  If I set PDP Type to IPV6 only then I don't get a working connection.  Even with IPV4 & IPV6 I get no IPV6 address on my laptop.  The same laptop works perfectly well using IPV6 on my router in the UK.

Do I need to change anything else in Dial-up Settings  to get IPV6 to work?  The SIM is certainly supposed to provide IPV6 connections.

I am on the boat in France where the MR600 is installed at the moment so I can try things out quite easily.

Any/all help very welcome.