  This review focuses on the physics of Gamma Ray Bursts probed through their
radio afterglow emission. Even though radio band is the least explored of the
afterglow spectrum, it has played an important role in the progress of GRB
physics, specifically in confirming the hypothesized relativistic effects.
Currently radio astronomy is in the beginning of a revolution. The high
sensitive Square Kilometer Array (SKA) is being planned, its precursors and
pathfinders are about to be operational, and several existing instruments are
undergoing upgradation. Thus, the afterglow detection statistics and results
from follow up programs are expected to improve in the coming years. We list a
few avenues unique to radio band which if explored to full potential have the
promise to greatly contribute to the future of GRB physics.

High Energy Astrophysical Phenomena