Chosen Solution
I am unable to connect my Olympus Tough TG-3 to Wi-Fi.
You will need a smartphone in order to connect to Wi-Fi. Download and start the OI.share app on your smartphone. Press and hold the “MENU” button. ( When [Connection Settings] is set to [Off], [Wi-Fi Start] is not available). Select among “Private” or “One-Time” connection and press “OK”.