  Some properties of lepton mixing and neutrino masses can be computed under
the assumption of A5 and CP as a symmetry in the leptonic sector. The results
show that four mixing patterns accommodate well the oscillation data, i.e. all
the mixing angles are in the 3sigma confidence region. We also introduce an
explicit realization of this framework in the case of the Weinberg operator
where the neutrino mass spectrum can be computed.
