Data roaming - O2/EPlus

[Stefan]

Maybe this helps you. Not a lot of persons have verified this though. Could you try it?

@michele

I had the same problem in Germany, didn’t want to switch roaming on, went to an O2 shop, didn’t get any help, BUT after a bit of digging I found the solution: just install gravitybox (a xposed module) go to phone tweaks and check national roaming. This way you don’t have to switch on standard roaming and you are able to use both networks, O2 and Eplus.

Link added by me.