  We propose a generalized version of the Tri-Bi-Maximal (TBM) ansatz for
lepton mixing, leading to non-zero reactor angle $\theta_{13}$ and CP
violation. The latter is characterized by two CP phases. The Dirac phase
affecting neutrino oscillations is nearly maximal ($\delta_{CP} \sim \pm
\pi/2$), while the Majorana phase implies narrow allowed ranges for the
neutrinoless double beta decay amplitude. The solar angle $\theta_{12}$ lies
nearly at its TBM value, while the atmospheric angle $\theta_{23}$ has the TBM
value for maximal $\delta_{CP}$. Neutrino oscillation predictions can be tested
in present and upcoming experiments.
