Recently upgraded from copper to fibre with HG633 router.
All devices connect wirelessly OK.
Two devices however cannot access the internet - Limited Connectivity.
Spent hours with Tech Support and the best they can come up with is a compatibility issue. This is probably true as if I connect my old copper router by ethernet cable to the back of the Huawei thing and power it up the two devices can connect to the old router and access the internet via the new router. Speeds are a bit down but still much better then before the upgrade.
Obviously this chinese rubbish needed a bit more testing!!
They tell me a D-Link modem is currently under test but it could be a while before a decent bit of kit is available.