I have calculated my average data usage and it is about 1,7 Gigabyte in a month. So as my mobile contract ends in one month, my new Contract only contains 2GB data instead of 4GB.
(Yes Germany is one of the most expensive countries in Europe or more specific our mobile providers are the most grasping Ones regarding Europe)
@christopher Yes. It works flawlessly, but it's not an excuse for expensive data plans.