How-To: Enabling Wireless Hotspot | AndroidGuys. Public WiFi is dangerous. Let me repeat that. Public WiFi is dangerous. Never use it. Never, never, never. If you don't want to learn how to create a VPN tunnel that encrypts your Internet traffic on public WiFi, use your own Internet connection when a secure line is not available. It is easier than you think. In fact, you already have a secure WiFi connection in your pocket. Now that all the carriers are going to unlimited data, just find one that allows you to use your phone as a mobile WiFi hotspot. T-Mobile, for example, allows you to use up to 10 GB a month from your phone, used as a hotspot. That is way more than you will need when you are out and about, and want a secure Internet connection. It is easy to setup and use, and, if you get an OnSync device to plug into your car's computer, the T-Mobile version includes a free hotspot in the car that has unlimited data use for many shared devices. Public WiFi may be convenient, but you are going to be a lot safer bringing your own. Be careful out there.