register a virtual phone number in Germany (mobile or local)

I need to register a virtual phone number in Germany on this site [login to view URL] In order to register one it is required to provide a valid proof of address and ID from Germany: - Proof of address (a copy of utility bill no older than of 6 months); - German passport or ID copy; - Specific registration form need to be filled and signed by user. Payment will be released only after the documents will be verified and accepted by the provider and the number is successfully registered.