  In a new simple application of the non-Abelian discrete symmetry $A_4$ to
charged-lepton and neutrino mass matrices, we show that for the current
experimental central value of $\sin^2 2 \theta_{13} \simeq 0.1$, leptonic CP
violation is necessarily large, i.e. $|\tan \delta_{CP}| > 1.3$.
