  We revisit the scattering problems for the 2D mass super-critical
Schr\"{o}dinger and Klein-Gordon equations with radial data below the ground
state in the energy space. We give an alternative proof of energy scattering
for both defocusing and focusing cases using the ideas of Dodson-Murphy
\citep{dodson2017new-radial}. Our results also include the exponential type
nonlinearities which seems to be new for the focusing exponential NLS.
