  We revisit the Simple Extension of the Standard Model (SESM) which can
account for various tentative new physics anomalies and dark matter (DM). We
consider a complete scalar potential which is needed to address the $W$ boson
anomaly. Interestingly, the SESM can simultaneously explain the B physics
anomaly, muon anomalous magnetic moment, $W$ mass anomaly, and dark matter,
etc. Also, we study the unitarity constraint in this model. We perform the
systematic study, and find the viable parameter spaces which can explain these
anomalies and evade all the current experimental constraints. To be complete,
we briefly comment on the neutrino masses and mixings, baryon asymmetry, and
inflation.
