  The use of extra space-time dimensions provides a promising approach to the
flavour problem. The chosen compactification of a 6-dimensional orbifold
implies a remnant family symmetry $A_4$. This makes interesting predictions for
quark and lepton masses, for neutrino oscillations and neutrinoless double beta
decay, providing also a very good global description of all flavour
observables. Due to an auxiliary $\mathbb{Z}_4$ symmetry, we implement a
scotogenic Majorana neutrino mass generation mechanism with a viable WIMP dark
matter candidate.
