Wi-Fi is a registered trademark [1], with a standard implementation, but I could easily see the sentence, "My phone is using wifi to access the internet." being acceptable.
[1] http://www.wi-fi.org/
Wi-Fi is a registered trademark [1], with a standard implementation, but I could easily see the sentence, "My phone is using wifi to access the internet." being acceptable.
[1] http://www.wi-fi.org/