  A realistic scheme for masses and mixing of leptons is investigated in the
model with gauged SO(3) lepton flavor symmetry. Within this scheme, a nearly
`bi-maximal' neutrino mixing pattern with maximal CP-violating phase is found
to be the only possible solution for reconciling both solar and atmospheric
neutrino flux anomalies. Three Majorana neutrino masses are nearly degenerate
and allow to be large enough to play a significant cosmological role. Lepton
flavor-violating effects via SO(3) gauge interactions can be as large as the
present experimental limits. Masses of the SO(3) gauge bosons are bounded to be
above 24 TeV when taking the SO(3) gauge boson mixing angle $\theta_{F}$ and
coupling constant $g'_{3}$ to be the same as those ($\theta_{W}$ and $g$) in
the electroweak theory.
