Currently, there are several solutions that allow obtaining measurements remotely. However, the readings of the energy meters are still performed manually in Brazil. This work makes a viability valuation of automated meter reading for energy billing. It is showed one revision of technical and functional concepts. The spread spectrum technique, mesh networks, powerline communication and cellular systems are highlighted. Additionally, regulatory aspects and standardization are detailed, according to regulatory agencies. It emphasizes rules and resolutions which determine the applicable frequency bands and the profit mechanism in the Brazilian electricity sector. Advanced topics are also exhibited, among them the use of cognitive radios and the occupation of the spectrum for television. In order to characterize the distribution market, data from three distribution companies and the current residential rates are detailed. On the other hand, the particularities of various remote reading systems are described. The viability study is made with five different simulation scenarios, they are applied to the three companies presented. In this context, it was possible to assess the importance of reducing the cost of regular reading and the revenue protection. However, these factors do not establish strong advance that justifies the use of automated meter reading in the Brazilian reality, considering the costs and the actual regulation.