Dlya etogo nuzhnu ustanovit na telefon icq klient. Esli telefon poderzhivaet Java, to skachat otsyuda:
http://www.jimm.org/. A esli eto Symbian smartfon, to otsyuda:
http://www.amobile.ru/soft/series60/sticq.htm .
Krome togo, tel dolzhen imet' podsoedinenie k GPRS ili UMTS.