Is it ok to claim free rolls using a phone or a tablet as long as you are connecting to your wifi network at home? I can't find anything about that on the website so I would assume it's ok, but I'd rather double-check.
Offcourse you can. I'm claiming from faucet using my home Wi-Fi on phone probably since the first day when I signed up on Freebitco.in. You also can claim using mobile data on your phone. You only should be more careful if you claim using public Wi-Fi addresses in places like cafe, supermarket and similar because sometimes these IP addresses may be red flagged by website and you're risking to get account banned.