If you are using your US mobile phone on a US plan, you dial the number when you are in Germany the same as if you were dialing from the US.
Do not use 011, as that is for reaching the US international operator from a landline.
If you are using your US mobile phone on a US plan, you dial the number when you are in Germany the same as if you were dialing from the US.
Do not use 011, as that is for reaching the US international operator from a landline.