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  2. Cable & Wireless Communications - Wikipedia

    Cable & Wireless Communications Ltd operating as C&W Communications is a telecommunications company which has operations in the Caribbean and Central America. It is owned by Liberty Latin America and is headquartered in Denver, Colorado.

  3. Prepaid mobile phone - Wikipedia

    Prepaid service has also evolved to include rate plans and buckets traditionally seen in postpaid plans but with a lower cost of ownership for the network operator. Such Advance Pay plans are often monthly plans with either Unlimited Voice/SMS/MMS (or monthly buckets for some of these) and Prepaid Data Volume Add-ons and throttling mechanisms.

  4. List of United States wireless communications service ...

    All 3 wireless providers also maintain legacy networks; of these, AT&T and T-Mobile use GSM and 3G UMTS (mostly converted to 4G HSPA+), while Verizon, Sprint (now a subsidiary of T-Mobile), and U.S. Cellular use cdmaOne/EV-DO/1xRTT. However, Verizon is in the process of shutting down their non-LTE networks.

  5. AT&T Mobility - Wikipedia

    SBC Wireless had previously operated in several northeast markets under the "Cellular One" brand, while BellSouth's wireless operations incorporated the former Houston Cellular. Cingular's lineage can be traced back to Advanced Mobile Phone Service , which was a subsidiary of AT&T created in 1978 to provide cellular service nationwide.

  6. Chelmsford - Wikipedia

    Essex County Council Highways & Transportation Department have considered constructing a 'Bus Rapid Transit System' to be built serving the Beaulieu Park/Springfield Area because of the increasing demand for Rapid Transit Plans in Ipswich, Colchester and Southend. Chelmsford has a park & ride service at nearby Sandon, just off Junction 18 of ...

  7. Alltel - Wikipedia

    The analog systems were retired by the end of 2008. While Alltel had not outlined its future path, merger partner Verizon Wireless had already announced plans to switch to GSM-based LTE. Network coverage. There were Alltel-owned and -operated networks in parts of 6 states. Alltel utilized roaming agreements with competing providers to provide ...

  8. Public switched telephone network - Wikipedia

    The public switched telephone network (PSTN) provides infrastructure and services for public telecommunication.The PSTN is the aggregate of the world's circuit-switched telephone networks that are operated by national, regional, or local telephony operators.

  9. Empty string - Wikipedia

    Formal theory. Formally, a string is a finite, ordered sequence of characters such as letters, digits or spaces. The empty string is the special case where the sequence has length zero, so there are no symbols in the string.