wlan test Hidden test app responding to the #232339*# and *#232338*# secret codes FYI : wlan = wireless LAN (https://en.wikipedia.org/wiki/Wireless_LAN) NOTE: Disabling this test will rise the exclamation mark on the WI-Fi icon and will show the message "Unable to connect to the host" in Settings -> Connections -> More connections settings - Private DNS - provider hostname. The connection seems to work despite those esthetic errors.
Phones target this application