Here we explore a flavor model to understand the cobimaximal lepton mixing ansatz based on A4 non-Abelain discrete symmetry. Guided by the symmetry, we explicitly construct the relevant lepton mass matrices with the involvement of A4 flavons. Tiny neutrino mass and mixing are analyzed here relying on the type-I seesaw mechanism
and we study the associated phenomenology. Subsequently, we draw interesting correlations between the neutrino mixing angles and absolute neutrino masses.