Precaution while using WiFi
Consider not using free Wi Fi at all
As I said, it can be safe to use open Wi Fi, but it s also very easy for it to be unsafe.The solution that you used while you were at that same coffee shop (and asked me about in this question) is a very common and solid one: use your phone instead. While it is technically possible, a mobile/cellular network connection is significantly less likely to be hacked. In fact I use this solution heavily when I travel.