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The way that Tin-Can works is that is takes over the wi-fi hotspot in order to set up an ad-hoc network. This is explained in the details of the app on the Google Play store. To get back to your regular settings so you can use the Wi-Fi hotspot as a hotspot for your computer or whatever, just go to your settings and change the settings for your Wi-Fi hotspot to the settings you want (ie: name: camaheuto's hotspot, pw: helloworld)