you can get a 5GB prepaid plan as well, it's something like 15€ ($17) per month (in Germany, which is among the more expensive countries regarding mobile phone

you can get a 5GB prepaid plan as well, it's something like 15€ ($17) per month (in Germany, which is among the more expensive countries regarding mobile phone tariffs). And when you go over your cap, your speed gets reduced to 64kbit but you don't pay extra. Some prepaid providers then allow you to "reset" your data cap for another 3-5€.