Radio light curves of GRB 160131A in the range 9 − 37 GHz. 8.93 GHz (top left) and 11.4 GHz (top right) fitted with a SPL (Eq. 2); the other light curves (24.6 GHz, middle left; 30.4 GHz, middle right; 37.1 GHz, bottom) are fitted with a BPL (Eq. (3)). Blue filled circles indicate detections, and upside-down triangles indicate 3σ upper limits; red circles indicate the ignored points corresponding to the peaks observed in radio SEDs (Fig. 4), and green lines show the resulting model.