The network deployment uses Ericsson's 5G Radio Access Network (RAN) and Core products and solutions.
These initial 5G deployments in Madrid and Barcelona will be followed by other locations as part of a four-year contract.
The network operates on 3.6GHz spectrum to deliver Massive MIMO, designed to increase network capacity and spectral efficiency.
Ericsson is also supplying Orange Spain with a 5G Evolved Packet Core to support 5G New Radio non-standalone (NSA), including control plane, user plane and policy network functions. These are all parts of the Ericsson Cloud Core portfolio.
Enhanced mobile broadband and advanced gaming are expected to be among the first applications for Orange Spain’s customers.
Last week the Spanish incumbent, Telefonica, launched 5G and promised coverage to 75% of the population by the end of this year.