I'm planning to spend about 10 days in Austria, Czech Republic and Germany, starting in Austria.
I'd like to have mobile internet for maps and getting information about cities. I'd like also to have the possibility to call foreign and maybe local numbers sometimes. It will be good if the card is ready to use just after purchase.
I wonder if there are any cards offering something like no-roaming tariffs for neighbouring countries or offering a reasonable price for my purposes in all three countries.
Does something like that exists? If not, what would be the nearest hit?