Unable to access the Internet in Germany. What can I do?

Hi,

I have been traveling to Germany with my simyo card for many years, and never had a problem before. But since 1-may-2016, I cannot access the Internet (2G/3G/LTE) anymore.

The sim works perfectly fine when i m in NL.

I've kept the settings on mijn simyo as 'internet binnenland := AAN' and 'internet buitenland := AAN'

Of course, mobile data and data roaming are both set to ON, on my Samsung.

I've tried to select different network providers, no use ...

I've tried forcing my phone to use 2G only, or 3G only, no use ...

And I've tried warm-booting my phone as well as turning it off and on again. No luck.

:(

Can someone pls help?

N.