Abstract: In this paper, we try to explain the advantages and the disadvantages of Wi-Fi, which is used a new access technology of WLAN, and then analyze the influence of the technology on 3G. Finally, it is discussed that faced with this new technology, telecommunication operators should regard Wi-Fi as an opportunity for their development and try to find much more space in the field of wireless communication.

Key words: Wi-Fi, wirelessfidelity, 3G, WLAN, IEEE802