Patent ID: 8538469

Claim:
A method for initial scanning of frequencies at start-up of a multi-band cellular communication apparatus, the method comprising: determining whether there is any interfering signal from any other communication system transmitting at a frequency in vicinity of frequencies of frequency bands of which the multi-band cellular communication apparatus is supposed to establish contact with a base station in at least one of the frequencies within the frequency bands; and if the determination gives a result of no interfering signal, applying a first scan procedure comprising plain scanning of the frequencies of the frequency bands of which the multi-band cellular communication apparatus is supposed to establish contact with a base station in at least one of the frequencies within the frequency bands, or if the determination gives a result of an interfering signal, applying a second scan procedure taking into account the determined interfering signal, wherein the second scan procedure comprises performing additional signal processing for at least a part of the frequency band being in vicinity of the determined interfering signal at the frequency scan, such that the determined interfering signal is taken into account.