  We derive formulae for neutrino masses and mixing angles in a type I seesaw
framework with an underlying A4 flavor symmetry. In particular, the Majorana
neutrino mass matrix includes contributions from an A4 triplet, 1, 1', and 1"
flavon fields. Using these formulae, we constrain the general A4 parameter
space using the updated global fits on neutrino mixing angles and mass squared
differences, including results from the Daya Bay and RENO experiments, and we
find predictive relations among the mixing parameters for certain choices of
the triplet vacuum expectation value. In the normal hierarchy case, sizable
deviation from maximal atmospheric mixing is predicted, and such deviation is
strongly correlated with the value of theta13 in the range of ~ (8-10) degrees.
On the other hand, such deviation is negligible and insensitive to theta13 in
the inverted mass hierarchy case. We also show expectations for the Dirac CP
phase resulting from the parameter scan. Future refined measurements of
neutrino mixing angles will test these predicted correlations and potentially
show evidence for particular triplet vev patterns.
