Originally it was planned that splitter can also divide the frequencies for the GSM network. But during several tests it showed, that in fact the easySPLIT could do this, as calcutaled by the simulation, but the normal VHF-antenna does not cover the frequency band which is necessary for the GSM-network. Even by several technical experiments we did not receive a good result.Our quality standard, to offer good solutions, did not allow us to proceed with that variant. Because the tool for the box was already finished, the hole for the GMS branching was kept inside at the early beginnig with our 1st generation of products. An after-market additional accessory will not be available in the future.