  We revisit asteroseismology with quadrupolar wI modes and present universal
relationships for its fundamental and first overtone. In contrast to
relationships proposed in the literature, our universal relationships are
capable of including slow stable hybrid stars that appear when considering slow
sharp hadron-quark phase transitions. We show that, if the frequency and
damping time of the fundamental mode of a given pulsating object are measured,
its mass, radius, and dimensionless tidal deformability can be inferred.
Moreover, we show that the errors of such estimates are smaller than a few
percent for the mass and radius. For the dimensionless tidal deformability, the
errors are -- for compact objects with $M\gtrsim 1.4\,M_\odot$ -- in general
smaller than ~100%. Comparison with previous universal relationships shows that
the ones proposed in this work produce better estimates of the mass and radius
of totally stable compact objects.
