Situation
You're not receiving IPv6 on your computer even though your phone has IPv6 provided by your mobile device.
Solution
In your mobile network settings --> APN, check if "APN roaming protocol" is set to "IPv4/IPv6".
If it is like the previous image, it won't work.
The correct way is as follows:
Personally, I never imagined that the APN roaming protocol was the problem, but it is.
I hope this helps.
