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  2. International direct dialing - Wikipedia

    en.wikipedia.org/wiki/International_direct_dialing

    An "international call prefix", "international dial-out code" or "international direct dial code" (IDD code) is a trunk prefix that indicates an international phone call. In the dialling sequence, the prefix precedes the country calling code (and, further, the carrier code, if any, and the destination telephone number).

  3. Roaming SIM - Wikipedia

    en.wikipedia.org/wiki/Roaming_SIM

    The use of roaming SIM cards in its most common form is in normal voice applications such as mobile phone calls. The common application of roaming SIMs for voice is where mobile calls are automatically routed to, and made on, the least cost network. This typically means that incoming calls are free, no matter which network a mobile user is on.

  4. List of mobile network operators in Asia and Oceania

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

    This is a list of all mobile phone carriers in the Asia Pacific Region and their respective number of subscribers. ... available for postpaid, request activation for ...

  5. Roaming - Wikipedia

    en.wikipedia.org/wiki/Roaming

    The HLR will send to the VLR a MAP PRN (Provide Roaming Number) message to obtain the MSRN of the roaming cell phone. Like that the HLR will be able to route the call to the correct MSC. With the IMSI contained in the MAP PRN message, the VLR assigns a temporary number known as the mobile station roaming number (MSRN) to the roaming cell phone.

  6. Telecommunications in Singapore - Wikipedia

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

    The government's role in the telecommunication industry is best demonstrated in the case of Singtel, which the state controls through its investment company Temasek Holdings Private Limited. Singtel does not only roll out affordable, high-quality telecommunication services to the city's residents, but it also pursues initiatives that will ...

  7. Singtel rules out impending deal to sell Australian unit Optus

    www.aol.com/news/singtel-confirms-no-intention...

    Southeast Asia's largest telecom operator, Singtel sought a trading halt after its shares sank 3.15% to S$2.46. The company then reiterated that there was no Optus divestment deal.

  8. Singtel - Wikipedia

    en.wikipedia.org/wiki/Singtel

    Singtel is also the second-largest company by market capitalisation listed on the Singapore Exchange [11] and is majority owned by Temasek Holdings, the investment arm of the Singapore government. Singtel is an active investor in innovation companies through its Singtel Innov8 subsidiary, founded in 2011 with S$200 million start up capital.

  9. Preferred Roaming List - Wikipedia

    en.wikipedia.org/wiki/Preferred_Roaming_List

    The Preferred Roaming List (PRL) is a database residing in a wireless (primarily CDMA) device, such as a cellphone, that contains information used during the system selection and acquisition process. In the case of R-UIM -based CDMA devices, the PRL resides on the R-UIM .