The expansion for a new generation of mobile communications is usually a process that takes years, it was added. In Berlin, there are more than 3000 locations with mobile phone antennas. Each of the three large radio network operators in Berlin, Telekom, Telefonica, Vodafone, would have to re-equip or partly re-set up about 1000 mobile phone sites. In the underground network, they are not yet ready, the Senate said. "The 5G mobile expansion in the Berlin underground has not yet begun." However, the expansion of LTE coverage by all network operators will soon be completed there, which means that the prerequisites for 5G will also be in place.