The polarimetric characteristics of the radio channels such as penetration loss, delay spread and angular spread, strongly influence the performances of the link between an outdoor base station (BS) and a mobile (MS) moving inside a building, especially in the case of a MIMO link. Measurement results have been recently published in the literature and they present either attenuation in the range 800 MHz to 18 GHz (R. Ignacio et al., Proc. of IEEE Vehicular Techno Conf., 14–17 Sept. 2014, pp. 1–5), or an analysis and modeling of the characteristics of diffuse scattering in indoor and outdoor radio propagation at 3.6 and 3.8 GHz (Y. Azar et al., Proc. of Int. Conf. on Future Generation Techno., 13–15 Aug. 2014, pp. 50–54). The objective of our work is to get a better insight on the changes of the channel properties when MS moves inside a building from a room situated in the Line of Sight (LOS) of the transmitter (Tx) to deep indoor (DI), i.e. in a room where there are at least 2 walls separation from the illuminated side of the building.