Well, partly solution for me should be to change my home wireless network to use the 802.11a or 802.11n, which works at the freq. 5 Ghz instead of 2.4 Ghz (802.11b/g). But this is solution just for my home, not for a public places and other places, where I have to use both devices and have no possibility to change the AP freq. to 5 Ghz.
Is this problem good to be send to service or not? That's another question, may be just specified one of my already written ones, what came to my mind...