Left: radio color-color plot of the halo, showing a complex spectral curvature distribution. The orange data points are extracted from the southern part of the halo while turquoise one from the northern part. The curvature distribution is seems different in the northern and southern parts of the halo. Regions used for extracting the spectral index values are are shown in the right panel of Fig. 11. Right: comparison between the radio (red) and the X-ray (blue) surface brightness profiles for the Abell 2744 halo. The X-radio and X-ray profiles are remarkably similar.