Forum Discussion

MartinF_3731540's avatar
MartinF_3731540
SMARTY Rookie
05-01-2026

Unable to get IPv6 address

I’m seeing mixed information on whether SMARTY/Three provides IPv6, so I’m hoping someone can clarify.

I’m using a 4G/LTE router (not a phone). The router supports IPv6 and is configured for dual-stack (IPv4/IPv6) with IPv6 auto-config enabled, and I’ve also tried requesting prefix delegation. The SIM connects fine for IPv4, but the WAN interface only ever shows a link-local IPv6 address (fe80::…), never a global IPv6 address or delegated prefix.

APN in use is three.co.uk.

Does SMARTY currently provide IPv6 for data connections, and if so:

is it available on all plans/SIMs, or only certain ones?
is there a specific APN or setting required to get IPv6 working on routers?
do you support IPv6 prefix delegation for LTE routers?

Any guidance appreciated. Thanks in advance.

2 Replies

  • PeterJ_195316's avatar
    PeterJ_195316
    SMARTY Pioneer
    24-03-2026

    It's not duel stack.  If it is anything like EE it will use 464XLAT mechanism, so put simply, the router's firmware would not support that.  I'm not sure if you could try forcing it to IPV6 only and that would work to some degree, but I doubt it.  

  • brainsys's avatar
    brainsys
    SMARTY Rookie
    21-03-2026

    Bump!

    To be able to connect to a declining percentage of public websites because of no IPv6 connectivity is not a good look Smarty/Three.