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  2. AT&T Wireless Services - Wikipedia

    en.wikipedia.org/wiki/AT&T_Wireless_Services

    The AT&T Wireless brand was retired by Cingular on April 26, 2005, six months after the close of the merger. This was per a pre-spinoff agreement with AT&T Corp. that stated that if AT&T Wireless was to be bought by a competitor, the rights to the name AT&T Wireless and the use of the AT&T name in wireless phone service would revert to AT&T Corp.

  3. No. 4 Electronic Switching System - Wikipedia

    en.wikipedia.org/wiki/No._4_Electronic_Switching...

    AT&T Long Distance was the primary customer for the switch. Driving development from the customer's perspective was AT&T VP Billy Oliver. [4] Previous tandem switching systems, primarily the No. 4 Crossbar switch, used analog voice signaling. The decision to switch in a digital voice format was controversial at the time, both from a technical ...

  4. List of mobile network operators in the United States

    en.wikipedia.org/wiki/List_of_mobile_network...

    Acquired by Verizon Wireless and AT&T Mobility. [39] AT&T Wireless Services: GSM: EDGE: 22: October 2004: Acquired by Cingular Wireless, which later rebranded to AT&T Mobility. [40] Big Sky Mobile: GSM: EDGE: Unknown: 2017: Sold spectrum licenses to AT&T and T-Mobile and exited the business. [41] Blaze Wireless: GSM, UMTS: EDGE, HSPA+, LTE ...

  5. Bell System Practices - Wikipedia

    en.wikipedia.org/wiki/Bell_System_Practices

    A typical volume of Bell System Practices from the 1970s. The Bell System Practices (BSPs) is a compilation of technical publications which describes the best methods of engineering, constructing, installing, and maintaining the telephone plant of the Bell System under direction of AT&T and Bell Telephone Laboratories. [1]

  6. US Cellular to sell some spectrum licenses to AT&T for ... - AOL

    www.aol.com/news/us-cellular-sell-spectrum...

    (Reuters) - United States Cellular said on Thursday it has agreed to sell a portion of spectrum licenses used to transmit mobile phone signals and high-speed data services to AT&T in a $1.02 ...

  7. Southwestern Bell - Wikipedia

    en.wikipedia.org/wiki/Southwestern_Bell

    Shortly afterwards, on January 15, 2006, AT&T companies were given new d.b.a names. As a result, officially, Southwestern Bell began conducting business under the following names: AT&T Arkansas, AT&T Kansas, AT&T Missouri, AT&T Oklahoma, and AT&T Texas. The regional d.b.a. name is now AT&T Southwest. The legal name remains Southwestern Bell ...

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. AT&T Communications - Wikipedia

    en.wikipedia.org/wiki/AT&T_Communications

    AT&T Phone (formerly AT&T U-verse Voice) is a voice communication service delivered over AT&T's IP network . This phone service is digital and provides a voicemail service accessed by *98 from the home number. Customers who subscribe to both AT&T Phone and U-verse TV get features such as call history on channel 9900, which displays the last 100 ...