Madrid, February 23rd, 2018.- Telefónica and Huawei have agreed on 4.5G evolution with first deployments in Bogotá, Monterrey and Rio de Janeiro. In this evolution to 4.5G, Telefónica is introducing 4x4 MIMO, 3C Carrier Aggregation (CA), 256-QAM and CloudAIR (Huawei’s proprietary technology) into its networks.