Google has lifted the invite-only restrictions on its popular Google Voice service. The VoIP service allows you to make free calls, send free SMS messages, and receiving voice mail transcripts completely for free. Unfortunately, the service is only available for in the USA.
Here is an overview from Google if you unaware about the service:
Even though the service is restricted to US residents, Etisalat has still gone ahead with blocking the registration page. Guess they don’t leave anything to chance.