[CentOS] OT: Making BT/Yahoo account accessible to plain router

My daughter has a BT account, with a BT supplied single-port router.  I'd like 
to replace it with a standard router, but the settings appear to be totally 
hidden.  If anyone reading uses BT, could you please tell me where to find 
the info?  Maybe off-list, to save bandwidth for others/  Thanks

Anne