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As a golden rule, you need to configure your device only exactly once, as instructed to by your home institution. From then on, you can use all eduroam hotspots world-wide worldwide without reconfiguring anything.
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Important: all configuration instructions are specific for the issuing institution. It is not helpful to follow configuration instructions of other institutions; the settings are different from institution to institution and you will very likely misconfigure mis-configure your device if trying third-party configurations.
If you are not sure whether or not your institution provides eduroam at all, the National Roaming Operator for your country may be able to help with your enquiry. To find out more, follow the linked maps from http://www.eduroam.org/
eduroam apps
eduroam provides several apps that may be of use to you. See the apps here.
eduroam network characteristics
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In Europe, a minimum number of services ("ports") must be made available at the hotspot. The list includes sending and receiving email (encrpytedly and unencryptedly), browsing web pages (encrpytedly and unencryptedly), and access to a wide variety of Virtual Private Networking (VPN) solutions which can connect you back to your home institution in privacy. The full list of ports is available in section 6.3.3 "Specifications and Operational Requirements: Service Providers" (p.31+) of the European eduroam Service Definition.
Apart from that, you should consider every eduroam network as a "normal ISP" network. In particular, the WPA2/AES encryption only protects your traffic while it is in the air; as soon as it travels onwards onto the internet, your traffic is not encrypted any more unless you chose to use encrypted transfer protocols (e.g. browse with https:// instead of http:// ; or if you started a VPN connection).
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