European Data Roaming SIM Card for iPhone
After doing some searching it seems like the consensus approach is that most AT&T users add a data roaming package before their ED if they plan on using their smartphone in Europe.
I'm a Sprint user (pity me) and I have an unlocked iPhone 4S that I plan on using heavily during my ED in May. Are there any local providers that have a straight forward and affordable prepaid data options for use in Europe (Germany, Austria, Switzerland, France)?
I came across iphonetrip.com while searching, which seems reasonable at ~$70ish for a week long trip, but they don't provide any definite coverage maps which makes me a little suspicious.
Are there any local providers in Germany that have good roaming rates throughout Europe? I'm hoping to load up a prepaid sim with around 20-30eur and have that last me the week.