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2. Fixed Dialing Number - Wikipedia

   en.wikipedia.org/wiki/Fixed_dialing_number

   Fixed Dialing Number (FDN) is a service mode of a GSM mobile phone's SIM card. [1] Numbers are added to the FDN list, and when activated, FDN restricts outgoing calls to only those numbers listed, or to numbers with certain prefixes. [1] A notable exception is that emergency calls to 000, 112, 911, 999 and the like are exempt. [2]

3. SIM card - Wikipedia

   en.wikipedia.org/wiki/SIM_card

   A typical SIM card (mini-SIM with micro-SIM cutout) A SIM card or SIM (Subscriber Identity Module) is an integrated circuit (IC) intended to securely store an international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephone devices (such as mobile phones and laptops).

4. Telephone numbers in the Philippines - Wikipedia

   en.wikipedia.org/wiki/Telephone_numbers_in_the...

   This affected subscription-based virtual numbers (i.e. Globe Duo), SIM card-based Telephone Service (i.e. PLDT Landline Plus Prepaid), #MyNumber (the format is #XXXXX, i.e. #87000 for Jollibee Delivery), FEX Lines, SIP Trunks, ISDN and vanity numbers, including virtual numbers like short-digit numbers (e.g., *1888 for PLDT Telephone Support ...

5. Telephone numbers in China - Wikipedia

   en.wikipedia.org/wiki/Telephone_numbers_in_China

   In major cities, landline numbers consist of a two-digit area code followed by an eight-digit local number. In other places, landline numbers consist of a three-digit area code followed by a seven- or eight-digit local number. Mobile phone numbers consist of eleven digits. Landline calls within the same area do not require the area code.

6. List of mobile network operators in the United States

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

   Each active SIM card is considered a subscriber. [7] Wholesale customers include users of machine to machine networks and mobile virtual network operators that operate on the host network, but are managed by wholesale partners. Subscriber counts are sourced from each companies quarterly reports.

7. GSM services - Wikipedia

   en.wikipedia.org/wiki/GSM_services

   A Subscriber Identity Module (SIM) card, which is activated by the operator once the billing relationship is established. After activation the card is then programmed with the subscriber's Mobile Subscriber Integrated Services Digital Network Number (MSISDN) (the telephone number). Personal information such as contact numbers of friends and ...

8. Local number portability - Wikipedia

   en.wikipedia.org/wiki/Local_number_portability

   As of August 2007, cell number portability must complete in 5 business days (i.e. excluding weekends) from the moment the request is confirmed by the customer, with the actual switch occurring late at night to avoid missing any calls. The user wakes up using a new SIM-card from the new cell provider while keeping the number.

9. Mobile number portability - Wikipedia

   en.wikipedia.org/wiki/Mobile_number_portability

   sim card of the new mobile company that will cost around 15 PEN. United States: 2003.11.24 0 Free iconectiv manages the Number Portability Administration Center (NPAC), the largest number portability system in the world. Consisting of seven regional systems, the NPAC facilitates number porting across all Service Providers in the United States.