Good Morning
I would only use a Three sim in the future. It has some reasons:
- I can use every month 12 GB of Data in over 50 Countrys worldwide!!
- I can call for 2 penny per minute! In Germany you will pay 9 cent per minute!
- It works in 60 Countrys worldwide and not only in the EU!!
http://www.three.co.uk/go-roam
Germany:
https://www.blau.de/tarife/prepaid-tarife/
or
https://www.otelo.de/files/2018-08/2...tabelle-LX.pdf
I will stay on Three!
I am using my Three sim since 4 Years in Germany I didn't got any problem with it.