I have a question about iPhone usage in Austria and Germany. Please see details inside.

I have an iPhone with WiFi. The hotels that we’ll be staying at in Austria and Germany have “free” WiFi. Will I be able to connect to the WiFi without any tweaking (like changing settings) other than entering a password?

If I can connect to WiFi, can I use Skype and iMessage, or do I need a data plan for these?

Also, will I need an electric plug adapter? If I’m not mistaken, I won’t need a voltage converter, as the iPhone is able to handle both 110 and 220 volts. Can someone please confirm this?