Method of detecting a loss of service availability, affecting a communication user equipment, wherein said communication user equipment and a number of base node stations are components of a cellular code division multiple access based radio network adapted for transmitting a signal comprising multiple communication signal units between the communication user equipment and a serving base node station (sBNS), wherein: a communication signal unit is correlated with a pseudonoise spread code in a serving cell coverage area of the serving base node station (sBNS) and transmitted as a pseudonoise chip in a multiple shared communication frequency channel spectrally located between an upper frequency and a lower frequency of a communication frequency band and wherein the method comprises the steps of: - measuring a set of power parameters at a first earlier time and at a second later time, wherein the power parameters comprise: a channel biased parameter significant for the received power at the communication user equipment antenna connector, and an unbiased parameter of unbiased received wide band power (RTWP) within the bandwidth of the communication user equipment receiver at the communication user equipment antenna connector. characterized by the step of - verifying the conditions, that (a) as compared to the first earlier time the channel biased parameter is not or less detectable at the second later time, and (b) in the case the unbiased parameter at the second later time as compared to the first earlier time has increased it is indicated, in particular to an application, that a jamming transmitter is affecting a communication user equipment, and/or in the case the unbiased parameter at the second later time as compared to the first earlier time has decreased it is indicated, in particular to an application, that an out of service situation is affecting a communication user equipment.. a communication signal unit is correlated with a pseudonoise spread code in a serving cell coverage area of the serving base node station (sBNS) and transmitted as a pseudonoise chip in a multiple shared communication frequency channel spectrally located between an upper frequency and a lower frequency of a communication frequency band and wherein the method comprises the steps of: - measuring a set of power parameters at a first earlier time and at a second later time, wherein the power parameters comprise: a channel biased parameter significant for the received power at the communication user equipment antenna connector, and an unbiased parameter of unbiased received wide band power (RTWP) within the bandwidth of the communication user equipment receiver at the communication user equipment antenna connector. - measuring a set of power parameters at a first earlier time and at a second later time, wherein the power parameters comprise: a channel biased parameter significant for the received power at the communication user equipment antenna connector, and an unbiased parameter of unbiased received wide band power (RTWP) within the bandwidth of the communication user equipment receiver at the communication user equipment antenna connector. a channel biased parameter significant for the received power at the communication user equipment antenna connector, and an unbiased parameter of unbiased received wide band power (RTWP) within the bandwidth of the communication user equipment receiver at the communication user equipment antenna connector. characterized by the step of - verifying the conditions, that (a) as compared to the first earlier time the channel biased parameter is not or less detectable at the second later time, and (b) in the case the unbiased parameter at the second later time as compared to the first earlier time has increased it is indicated, in particular to an application, that a jamming transmitter is affecting a communication user equipment, and/or - verifying the conditions, that (a) as compared to the first earlier time the channel biased parameter is not or less detectable at the second later time, and (b) in the case the unbiased parameter at the second later time as compared to the first earlier time has increased it is indicated, in particular to an application, that a jamming transmitter is affecting a communication user equipment, and/or (a) as compared to the first earlier time the channel biased parameter is not or less detectable at the second later time, and (b) in the case the unbiased parameter at the second later time as compared to the first earlier time has increased it is indicated, in particular to an application, that a jamming transmitter is affecting a communication user equipment, and/or in the case the unbiased parameter at the second later time as compared to the first earlier time has decreased it is indicated, in particular to an application, that an out of service situation is affecting a communication user equipment..