Beware Free Wifi!
There are a number of ways attackers can steal personal information from you and your devices while using free WiFi. This includes (but is not limited to) hotels, restaurants & libraries. You can spot an insecure network by the absence of a lock icon next to the network name.
Always use secure networks that you have been authorized to use and given the password to. When using a mobile device, use your cellular data when possible rather than insecure WiFi networks. When using a non-cellular device, tethering is a favorable option (sharing the network connection from your phone to your computer).
In the event that you have to use an insecure connection, using a VPN (a virtual private network) is recommended. They're simple to set up and often times free. Good luck and stay safe!