  This paper embodies the Fox's ${\mathcal H}$-transform theory into a unifying
modeling and analysis of HetNets. The proposed framework has the potential, due
to the Fox's ${\mathcal H}$-functions versatility, of significantly simplifying
the cumbersome analysis and representation of cellular coverage, while
subsuming those previously derived for all known simple and composite fading
models. The paper reveals important insights into the practice of densification
in conjunction with signal-to-noise plus interference (SINR) thresholds and
path-loss models.
