I am going to be traveling for 1 month in a variety of countries: Germany, France, Austria, Czech and possibly Slovakia. I am looking for a sim card I can prepay, no contract (1 month) and that has significant data. Right now I'm noticing that German options don't include a lot of data (at most 5gb and that is 45 euro). The best I'm finding is O2 seems to have an offer that gives me extra data at the moment. In the past I used Three UK, but I know that wouldn't let me make calls to the countries im visiting, just allows me to have roaming data.
Anyone have any other suggestions?