A mobile signal small cell aggregator system allows mobile signals from multiple network operators to be combined and split from the system. The system receives input from multiple ports from one or more network operators and operator bands and transfers the signals to a downlink/summing or aggregation unit which sends the signals to connected antennas to be received by users of the particular network operator. Signals received from connected antennas from users of one or more network operators are aggregated and switched to the appropriate small cell port and forwarded to the selected network operator. The system is configured to provide network control, power monitoring and attenuation, and a single GPS input for use by all of the connected network operators.