Can I disable the popup window announcing a new network is available?
Yes! To disable this feature, go to Start, Settings, Sounds & Notifications, Notifications (tab), select Connection established from the dropdown list and uncheck the Display message on screen box and “OK” your way back to the Today screen. You should understand that Windows Mobile will no longer inform you when a network is in range, but many people use third party software, such as PocketWiNc or WiFiFoFum for detecting and connecting to networks, so the Windows application becomes an annoyance.
