AT&T today announced its Wireless Home Phone & Internet service is opening up for nationwide availability. The carrier is allowing customers on a Mobile Share plan with 10GB or more to add the serviceHome Base for $30/month.

The service starts as a trial in select markets in 2013. AT&T offered wireless home phone service as a $20 monthly add-on for existing Mobile Share plans.

The service works with a wireless router called Home Base that connects to AT&T’s LTE network. Any home phone can be plugged into the Home Base and AT&T promises up to 10 devices can connect to the Wi-Fi.

Customers can for $5 monthly and get penny-per-minute calling from the U.S. to Canada, Mexico and more than 35 other countries.

The standalone Wireless Home Phone & Internet service charges $20/month for unlimited nationwide calling and then offers three different data buckets: $60 for 10GB, $90 for 20GB and $120 for 30GB. AT&T includes a $10 overage charge for every extra 1GB used. The Home Base is free with a two-year agreement.

AT&T’s fixed mobile broadband offer follows last year’s agreement between Sprint and Dish Network to offer a similar service on a trial basis in Texas. Dish recently expanded a similar agreement with nTelos, a regional operator based in Virginia. nTelos CEO James Hyde recently said he expects the joint service with Dish to officially launch in July.