A method for checking the location of a femtocell with the following steps: receiving radio signals (S1, S2, S3) from at least three transmitters (14, 16, 18) at known locations by the femtocell and by a reference receiver at a known location, determining differences in delay of the radio signals from two of the at least three transmitters based on reception times of the radio signals received by the femtocell and the reference receiver; checking the location of the femtocell based on the determined differences in delay, determining whether the location of the femtocell corresponds to one or more planned locations of the femtocell, and depending therefrom, activating a provision of mobile communications by the femtocell within the area covered by the femtocell, wherein each of the at least three transmitters (14, 16, 18) is respectively a broadcast transmitter or a pilot radio signal transmitter configured to broadcast a pilot radio signal for checking the location of a femtocell in a frequency range outside frequency ranges used for mobile communication, and wherein the determining of the differences in delay of the radio signals from two of the at least three transmitters and the checking of the location of the femtocell based on the determined differences in delay are performed by a control and monitoring entity of a mobile communication network, wherein time differentials being determined based on the reception times of the radio signals received by the femtocell and the reference receiver are communicated by the femtocell and the reference receiver to the control and monitoring entity so as to check the location of the femtocell and/or the local reception times of the radio signals are communicated by the femtocell and the reference receiver to the control and monitoring entity. receiving radio signals (S1, S2, S3) from at least three transmitters (14, 16, 18) at known locations by the femtocell and by a reference receiver at a known location, determining differences in delay of the radio signals from two of the at least three transmitters based on reception times of the radio signals received by the femtocell and the reference receiver; checking the location of the femtocell based on the determined differences in delay, determining whether the location of the femtocell corresponds to one or more planned locations of the femtocell, and depending therefrom, activating a provision of mobile communications by the femtocell within the area covered by the femtocell, wherein each of the at least three transmitters (14, 16, 18) is respectively a broadcast transmitter or a pilot radio signal transmitter configured to broadcast a pilot radio signal for checking the location of a femtocell in a frequency range outside frequency ranges used for mobile communication, and wherein the determining of the differences in delay of the radio signals from two of the at least three transmitters and the checking of the location of the femtocell based on the determined differences in delay are performed by a control and monitoring entity of a mobile communication network, wherein time differentials being determined based on the reception times of the radio signals received by the femtocell and the reference receiver are communicated by the femtocell and the reference receiver to the control and monitoring entity so as to check the location of the femtocell and/or the local reception times of the radio signals are communicated by the femtocell and the reference receiver to the control and monitoring entity.