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2. AT&T's international data plans are now a little more reasonable

   www.aol.com/news/2017-12-12-att-passport...

   The carrier has updated its Passport packages to give you 1GB of data and unlimited texting in a one-time $60 purchase, and 3GB for $120. ... AT&T's international data roaming packs just became ...

3. List of mobile virtual network operators in the United States

   en.wikipedia.org/wiki/List_of_mobile_virtual...

   Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the four major cellular carriers in the country—AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.

4. 1-800-COLLECT - Wikipedia

   en.wikipedia.org/wiki/1-800-COLLECT

   Prior to 1993, collect calling was a virtual monopoly held by AT&T as people were accustomed to dialing "0" to place collect calls. MCI moved aggressively to insert itself into the market by launching 1-800-COLLECT that year.

5. AT&T adds an international roaming day pass with catches - AOL

   www.aol.com/news/2017-01-23-att-international...

   AT&T subscribers haven't had the greatest international roaming options. The carrier's Passport plans give you a tiny amount of data even at the highest tier, which could make it cheaper to unlock ...

6. AT&T - Wikipedia

   en.wikipedia.org/wiki/AT&T

   AT&T was founded as Bell Telephone Company by Alexander Graham Bell, Thomas Watson and Gardiner Greene Hubbard after Bell's patenting of the telephone in 1875. [22] By 1881, Bell Telephone Company had become the American Bell Telephone Company. [23]

7. International telecommunications routes - Wikipedia

   en.wikipedia.org/wiki/International...

   A carrier receives calls in country A, turns them into IP packets using an IP gateway device and sends them over an IP connection (public or dedicated) to another carrier or ISP in country B, which re-assembles the voice call and sends it out from a PBX. The cost is composed of the cost to convert the call, IP connectivity, convert the call back.