When we say ከዋይፋይ we're implying that Wi-Fi is a source in itself, but Wi-Fi is one type of way to connect our devices to the internet. so to correct that its better to say በዋይፋይ which implies that Wi-Fi is one mode of internet connection. and I also changed በሚገናኝበት ጊዜ to በተገናኘ ጊዜ because the word በሚገናኝበት ጊዜ shows that the action is still in the process but the word በተገናኘ ጊዜ gives a sense of completion of the action.