French ISP and mobile provider Free has boosted its promotion for inexpensive wireless calling with a family plan that provides unlimited calling within France, its territories overseas, the United States, Canada, Alaska, Hawaii, China, and nearly 100 other countries, unlimited SMS/MMS messaging, and up to 20GB of 4G data for $15 a month. The old off-promotion price (and for non-bundled customers) is around $20 a month.

The promotion increases to four the number of family members that can participate, which means taking full advantage will result in a monthly cell bill of around $60.

A comparable Family Share plan from AT&T offering 20GB of rollover 4G data costs customers $150 a month… for one line.