A process to be used in a Global System for Mobile, GSM, Communication for determining whether to ignore a Paging Channel, PCH, message block through analysis of a first burst of the PCH message block, the process comprising: a step of storing a first binary reference-vector, a second binary reference-vector, and a third binary reference-vector, in at least one handset memory; a step of receiving the first burst of the PCH message block; a step of sampling and quantizing the received first burst; a step of creating at least one binary received-vector employing the elements of the quantized data; a step of multiplying each element of the first binary reference-vector by the corresponding element of the binary received-vector and adding them together to form a dummy-detection-value; a step of multiplying each element of the second binary reference-vector by the corresponding element of the binary received-vector and adding them together to form a first mode0-detection-value; a step of multiplying each element of the third binary reference-vector by the corresponding element of the binary received-vector and adding them together to form a second mode0-detection-value; a step of computing a first and a second threshold value utilizing the average of the absolute values of the quantized data; and a step of deciding that: the handset needs to analyze the rest of the PCH bursts if the dummy-detection-value is less than the first computed threshold value; the handset does not need to analyze the rest of the PCH bursts if the dummy-detection-value is equal to or more than the first threshold value and either one of the first mode0-detection-value or the second mode0-detection-value is equal to or more than the second threshold value; and the handset needs to analyze the rest of the PCH bursts if the dummy-detection-value is equal to or more than the first threshold value and both of the first mode0-detection-value and the second mode0-detection-value are less than the second threshold value. a step of storing a first binary reference-vector, a second binary reference-vector, and a third binary reference-vector, in at least one handset memory; a step of receiving the first burst of the PCH message block; a step of sampling and quantizing the received first burst; a step of creating at least one binary received-vector employing the elements of the quantized data; a step of multiplying each element of the first binary reference-vector by the corresponding element of the binary received-vector and adding them together to form a dummy-detection-value; a step of multiplying each element of the second binary reference-vector by the corresponding element of the binary received-vector and adding them together to form a first mode0-detection-value; a step of multiplying each element of the third binary reference-vector by the corresponding element of the binary received-vector and adding them together to form a second mode0-detection-value; a step of computing a first and a second threshold value utilizing the average of the absolute values of the quantized data; and a step of deciding that: the handset needs to analyze the rest of the PCH bursts if the dummy-detection-value is less than the first computed threshold value; the handset does not need to analyze the rest of the PCH bursts if the dummy-detection-value is equal to or more than the first threshold value and either one of the first mode0-detection-value or the second mode0-detection-value is equal to or more than the second threshold value; and the handset needs to analyze the rest of the PCH bursts if the dummy-detection-value is equal to or more than the first threshold value and both of the first mode0-detection-value and the second mode0-detection-value are less than the second threshold value. the handset needs to analyze the rest of the PCH bursts if the dummy-detection-value is less than the first computed threshold value; the handset does not need to analyze the rest of the PCH bursts if the dummy-detection-value is equal to or more than the first threshold value and either one of the first mode0-detection-value or the second mode0-detection-value is equal to or more than the second threshold value; and the handset needs to analyze the rest of the PCH bursts if the dummy-detection-value is equal to or more than the first threshold value and both of the first mode0-detection-value and the second mode0-detection-value are less than the second threshold value.