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We present a see-saw $A_4$ model for Tri-Bimaximal mixing which is based on avery economical flavour symmetry and field content and still possesses all thegood features of $A_4$ models. In particular the charged lepton masshierarchies are determined by the $A_4\times Z_4$ flavour symmetry itselfwithout invoking a Froggatt-Nielsen U(1) symmetry. Tri-Bimaximal mixing isexact in leading order while all the mixing angles receive corrections of thesame order in next-to-the-leading approximation. As a consequence the predictedvalue of $\theta_{13}$ is within the sensitivity of the experiments which willtake data in the near future. The light neutrino spectrum, typical of $A_4$see-saw models, with its phenomenological implications, also includingleptoproduction, is studied in detail.

A Simplest A4 Model for Tri-Bimaximal Neutrino Mixing