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2. Prepaid mobile phone - Wikipedia

   en.wikipedia.org/wiki/Prepaid_mobile_phone

   A prepaid mobile device, also known as a pay-as-you-go ( PAYG ), pay-as-you-talk, pay and go, go-phone, prepay or burner phone, is a mobile device such as a phone for which credit is purchased in advance of service use. The purchased credit is used to pay for telecommunications services at the point the service is accessed or consumed.

3. Mobile number portability - Wikipedia

   en.wikipedia.org/wiki/Mobile_number_portability

   Customers can port between prepaid and postpaid options. On porting IN, the recipient company provides, free credit and airtime. The service is handled by Pakistan MNP Database (Guarantee) Limited, the joint venture of all the cellular companies of Pakistan. Number Portability Clearinghouse service is handled by iconectiv. Philippines: 2021.09.30

4. Postpaid mobile phone - Wikipedia

   en.wikipedia.org/wiki/Postpaid_mobile_phone

   The postpaid mobile phone is a mobile phone for which service is provided by a prior arrangement with a mobile network operator. The user in this situation is billed after the fact according to their use of mobile services at the end of each month. Typically, the customer's contract specifies a limit or "allowance" of minutes, text messages etc ...

5. BSNL Mobile - Wikipedia

   en.wikipedia.org/wiki/BSNL_Mobile

   History. Bharat Sanchar Nigam Limited (BSNL) was incorporated on 15th September 2000. It took over the business of providing telecom services and network management from the erstwhile Central Government Departments of Telecom Services (DTS) and Telecom Operations (DTO), with effect from 1 October 2000 on a going concern basis, in early days it was known as CellOne for GSM mobile services ...

6. CAMEL Application Part - Wikipedia

   en.wikipedia.org/wiki/CAMEL_Application_Part

   CAMEL is used when the subscriber is roaming between networks, allowing the home network to monitor and control calls made by the subscriber. CAMEL provides services such as prepaid roaming services, fraud control, special numbers (e.g., 123 for voicemail that works everywhere) and closed user groups (e.g., office extension numbers that work ...

7. Intelligent Network - Wikipedia

   en.wikipedia.org/wiki/Intelligent_Network

   The Intelligent Network ( IN) is the standard network architecture specified in the ITU-T Q.1200 series recommendations. [1] It is intended for fixed as well as mobile telecom networks. It allows operators to differentiate themselves by providing value-added services in addition to the standard telecom services such as PSTN, ISDN on fixed ...