Yes, I'm able to connect to the C::B forums through mobile data of my phone. But I have to do that from an other PC because my main one is a desktop without bluetooth !
On that other PC, a laptop, I have to connect it to my phone via bluetooth, declare my phone to share the internet connection via mobile data.
OK ... but it's also tedious, and apparently I'm not alone with this problem : New Pagody seems to have the same problem. And of course, only guys able to connect to forums can tell you that they have a problem ! Sometimes, it seems to work, but in the "best" case, after filling a new post, you obtain this Database Error when clicking on the "post" button ! very frustrating !