Google has reserved 1 million phone numbers with Level 3 communication. The claim signaling for the roll out of long-anticipated Google Voice, currently available to a limited number of users. The free service lets users unify their phone numbers, allowing them to have a single number through Google Voice that rings a call through to all their phones, and has a number of unique features including: call transfer between a user's devices, multi-party conferencing, conversion of voice calls to text messages, cut-rate international calling, and call transcription. Google also integrated the Voice service with Gmail contact lists.