A day after I purchased the iPhone I joined it to the T-Mobile HotSpot network. Last week I ported the number associated with the HotSpot account and the account was closed. Friday I walked into a Starbucks and my iPhone kept connecting to T-Mobile. It took me a little while to figure out how to remove the WIFI entry and decided to document the steps.
It is a simple process when you know where to look. You go to settings/WIFI, select the entry you want to remove (with check mark on left) under "Choose a network", and press the > at the right of entry.
At the top of the next screen you press the "Forget this Network" button to delete the entry.
Published with the Typepad iPhone application.