First, you must be able to make the call—but let’s not rag on AT&T’s service today. Secondly, though, to qualify for Unlimited Mobile to Any Mobile, you must maintain an unlimited messaging plan and a “qualifying” voice plan with AT&T.
But if you do have that unlimited texting plan (which costs $20 per month for individuals, and $30 per month for FamilyTalk plans) and one of those so-called qualifying voice plans, you can start enjoying free mobile-to-mobile calls—both those you place and those you receive—as of Thursday.
It appears, however, that you must sign up for Mobile to Any Mobile at AT&T’s Website, even if your account already fits the bill. The company promises that more details—including, one would hope, just which voice plans do indeed qualify—are coming on Thursday.
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