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Like when using public wifi, what can I install/use on both my Android phone and Windows laptop to make it impossible (or very difficult for someone who is not an expert) from seeing what websites i visit?

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You can route your connection through a VPN. This will encrypt the connection from your device to the VPN provider, therefore making it impossible for the wifi router owner to scan your traffic. See Understanding VPNs : How VPNs can be used for anonymization? for more info.

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I would recommend using a VPN(Virtual Private Network), and of course it should be switched on immediately after connecting to the access point you want to use. A VPN would assign you a different IP address and encrypt your network connection, so that even a skilled network admin would find it nearly impossible to see your traffic. There are a number of free ones you may want to try to see how it works or you may want to read a bit more about them.

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    "... and off course it should be switched on before even connecting to the access point ...". That's not possible! You need an internet connection before you can connect to the VPN. "... A VPN basically makes you look like you're not on a network ...". Also wrong! The fact that you have an encrypted connection to the VPN is fully visible in the traffic. – user10216038 Jun 21 at 16:15
  • Unfortunately, every technical fact you pose in the answer is incorrect. Please look up how VPNs work and review the OSI model to understand a VPN's place in a network. – schroeder Jun 23 at 7:21

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