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  2. Rechargeable calling card - Wikipedia

    en.wikipedia.org/wiki/Rechargeable_calling_card

    A rechargeable calling card or a recharge card is a type of telephone card that the user can "recharge" or "top up" by adding money when the balance gets below a nominated amount. In reality, the rechargeable calling card is a specialised form of a prepaid or debit account. To use the phone card, the user would call an access number (which is ...

  3. Unstructured Supplementary Service Data - Wikipedia

    en.wikipedia.org/wiki/Unstructured_Supplementary...

    Unstructured Supplementary Service Data. Unstructured Supplementary Service Data ( USSD ), sometimes referred to as " quick codes " or " feature codes ", is a communications protocol used by GSM cellular telephones to communicate with the mobile network operator 's computers. USSD can be used for WAP browsing, prepaid callback service, mobile ...

  4. Mobile equipment identifier - Wikipedia

    en.wikipedia.org/wiki/Mobile_equipment_identifier

    Mobile equipment identifier. A mobile equipment identifier (MEID) is a globally unique number identifying a physical piece of CDMA2000 mobile station equipment. The number format is defined by the 3GPP2 report S.R0048 but in practical terms, it can be seen as an IMEI but with hexadecimal digits. Regional code. Manufacturer code. Serial number. CD.

  5. Access Point Name - Wikipedia

    en.wikipedia.org/wiki/Access_Point_Name

    Access Point Name. An Access Point Name ( APN) is the name of a gateway [1] between a mobile network ( GSM, GPRS, 3G, 4G and 5G) and another computer network, frequently the public Internet. [2] A mobile device making a data connection must be configured with an APN to present to the carrier. The carrier will then examine this identifier to ...

  6. List of mobile telephone prefixes by country - Wikipedia

    en.wikipedia.org/wiki/List_of_mobile_telephone...

    268 7xx. 10. NANP member. Argentina. +54. 9/15. 10. All carriers: Claro, Movistar, Personal, Tuenti. 15 before the local number but after long distance area code for national calls (0 11 15 xxxx-xxxx) and 9 placed after the international access code excluding the 15 for international calls (+54 9 11 xxxx-xxxx).

  7. Telephone numbering plan - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbering_plan

    A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints. [1] Telephone numbers are the addresses of participants in a telephone network, reachable by a system of destination code routing. Telephone numbering plans are defined in each of ...

  8. Telecommunications in Puerto Rico - Wikipedia

    en.wikipedia.org/wiki/Telecommunications_in...

    Calling code-area codes: +1-787, +1-939; International call prefix: 00; Main lines: 780,200 lines in use, 87th in the world (2012). Mobile cellular: 3.1 million lines, 130th in the world (2012). System: modern digital system integrated with that of the United States (2011).

  9. World’s longest road and rail tunnel is being built ... - AOL

    www.aol.com/world-longest-road-rail-tunnel...

    June 25, 2024 at 8:07 AM. Descending up to 40 meters beneath the Baltic Sea, the world’s longest immersed tunnel will link Denmark and Germany, slashing journey times between the two countries ...