Method of detecting a jamming transmitter affecting a communication user equipment, wherein said communication user equipment, having a communication module, is adapted for communication with a component of a radio network based on a cellular global system for mobile communications, having a number of user equipments and a number of base stations, wherein said method comprises - providing the user equipment in a connected mode of a communication radiolink with the component of the radio network; wherein in the connected mode of said user equipment the steps are provided: - setting an early power indicator (RSSI-t1) determined at a first time indicative of a received radio signal strength, wherein the early power indicator set is assumed for a state of the user equipment unaffected by a radiolink error, wherein setting the early power indicator is executed by measuring the early power indicator determined at the first time, indicative of a received radio signal strength; - providing a radiolink evaluation, evaluating whether the communication radiolink is affected by a radiolink error, and wherein it is verified that a scoring-counter is changed due to a number of radiolink-irregularities to identify a radiolink failure, and - in case of a radiolink error identification performing the following steps: - determining a later power indicator (RSSI-t2) at a second time indicative of a received radio signal strength, wherein the later power indicator determined is defined for a state affected by a radiolink error of the user equipment; - comparing the early power indicator (RSSI-t1) from the first time to the later power indicator (RSSI-t2) from the second time, and - indicating a jamming affection in case the comparison shows that the received radio signal strength is unchanged or has increased. - providing the user equipment in a connected mode of a communication radiolink with the component of the radio network; wherein in the connected mode of said user equipment the steps are provided: - setting an early power indicator (RSSI-t1) determined at a first time indicative of a received radio signal strength, wherein the early power indicator set is assumed for a state of the user equipment unaffected by a radiolink error, wherein setting the early power indicator is executed by measuring the early power indicator determined at the first time, indicative of a received radio signal strength; - providing a radiolink evaluation, evaluating whether the communication radiolink is affected by a radiolink error, and wherein it is verified that a scoring-counter is changed due to a number of radiolink-irregularities to identify a radiolink failure, and - in case of a radiolink error identification performing the following steps: - determining a later power indicator (RSSI-t2) at a second time indicative of a received radio signal strength, wherein the later power indicator determined is defined for a state affected by a radiolink error of the user equipment; - comparing the early power indicator (RSSI-t1) from the first time to the later power indicator (RSSI-t2) from the second time, and - indicating a jamming affection in case the comparison shows that the received radio signal strength is unchanged or has increased.