Dialing US to German cell phone

I had a user try to dial a German Cell phone, they dialed 011 49 171 xxx xxxx . The system log is saying, Got SIP response 484 “Address Incomplete”. The user then hears the FreePBX play back ‘ss-noservice.ulaw’. When I tested it and tried dialing a LAN line in Germany 011 49 611 143 xxx xxxx it went through. When I test the cell phone on a POTs line it goes through no problem. Any ideas?

Make sure you have a dial pattern that allows international calls in your outbound route.
You should have an entry that looks like “011.” (no quotation marks)
Some SIP providers disallow international calls by default - so check your account settings.