Text-to-join sign-up is a great tool to help grow your list! The added hyphen in the phone number you are texting is something Constant Contact cannot control. This is automatically added by mobile devices, it how does not affect how the tool will work. What carried are you using and what type of device are you doing the Text To Join on (Android, iPhone, Other)? I have even tested the keyword created in your account and was unable to replicate receiving a German response. My test email was able to successfully add to your account. Can you provide a screenshot of this response?