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When I need to call people and I don't trust the local providers, I just encrypt it out and then I get my voice call. Related : 10 Data Security Mistakes Startups Can't Afford to Make 4. Avoid hotel WiFi and business centersIf your business has a properly configured VPN -- a Virtual Private Network -- your information is generally safe. But occasionally, if you're using the hotel’s WiFi -- either in the business center or your room -- it will block your VPN or only certain ones will work. A lot of these hotels, to even get online, you can't get on the WiFi without first accepting the terms of service or paying or something. So you can't use your VPN for that portion and that's the most dangerous period, a lot of those use expired SSL search that are not compatible with modern browsers.