The INO-ICAL collaboration has constructed a prototype detector known as mini-ICAL at IICHEP, Madurai, India \((9^\circ 56' N, 78^\circ 00' E)\) to evaluate its performance and address technical challenges related to the development of the full-scale INO-ICAL detector. Mini-ICAL comprises 11 layers of iron plates, each measuring 4 m \(\times \) 4 m \(\times \) 5.6 cm, separated by 45 mm gaps to house Resistive Plate Chambers (RPCs) that serve as tracking detectors. Situated at ground level, the setup detects cosmic muons originating from atmospheric showers caused by cosmic ray interactions in the upper atmosphere. Simulations utilize the CORSIKA event generator and Geant4 toolkit for modeling detector geometry and muon interactions while accounting for detector inefficiencies and noise. This study presents the first results on analysis of muon charge ratio as a function of muon momentum and azimuthal angle, covering a momentum range of approximately 1–3 GeV/c and zenith angles upto \(50^\circ \) . The data are further compared with predictions from multiple hadronic interaction models implemented in CORSIKA.