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2. SIM card - Wikipedia

   en.wikipedia.org/wiki/SIM_card

   SIM cards are identified on their individual operator networks by a unique international mobile subscriber identity (IMSI). Mobile network operators connect mobile phone calls and communicate with their market SIM cards using their IMSIs. The format is: The first three digits represent the Mobile country code (MCC).

3. TracFone Wireless - Wikipedia

   en.wikipedia.org/wiki/TracFone_Wireless

   TracFone Wireless, Inc. ( TFWI) is an American prepaid, no-contract mobile phone provider. TFWI is a subsidiary of Verizon Communications, [1] and offers products and services under several brands. It operates as a mobile virtual network operator (MVNO), holding agreements with the three largest United States wireless network operators to ...

4. List of mobile virtual network operators in the United States

   en.wikipedia.org/wiki/List_of_mobile_virtual...

   Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the three major cellular carriers in the country, AT&T Mobility, T-Mobile US, and Verizon. [1] [2] In 2016, MVNOs across the nation such as Metro PCS, Boost Mobile, Cricket Wireless, and Tracfone brands served about 36 million subscribers.

5. International call - Wikipedia

   en.wikipedia.org/wiki/International_call

   International telephone calls are those made between different countries. These telephone calls are processed by international gateway exchanges (switches). Charges for these calls were high initially but declined greatly during the 20th century due to advances in technology liberalization. Originally they were placed via long-distance operators.

6. ETECSA - Wikipedia

   en.wikipedia.org/wiki/ETECSA

   Sale of prepaid phone cards and own card recharge. Sale of prepaid Internet access cards. '(*)' Hiring the caller ID service. Internet access. '(*)' Public phone booths for national and international calls. Videoconference and audio-conference. Quick collection of the telephone bill; Telephony for the deaf and hard of hearing. Fax transmission ...

7. PC Mobile - Wikipedia

   en.wikipedia.org/wiki/PC_Mobile

   PC Mobile is a licensed white label prepaid wireless service operated in Canada. Its mobile telephone products and services operate on the network infrastructure operated by Bell Mobility and formerly Telus Mobility (the two companies managed one of the service types each with Telus discontinuing the postpaid service in October 2018), but licensed the proprietary branding and payment media ...