In this paper, we present an investigation of the near fields (NF) of different configurations of two antennas mobile phones with a candy bar phone factor. The study has been carried out via Finite Difference Time Domain (FDTD) simulations. Interesting paradigms not valid for the single antennas have been identified. In order to obtain a hearing aids compatible (HAC) mobile phone having two antennas,
special attention has to be focused on the NF at the high band as opposed to the single antenna case where the HAC is defined by the NF at the low band.