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2. Ringing tone - Wikipedia

   en.wikipedia.org/wiki/Ringing_tone

   Ringing tone (audible ringing, also ringback tone) is a signaling tone in telecommunication that is heard by the originator of a telephone call while the destination terminal is alerting the receiving party. The tone is typically a repeated cadence similar to a traditional power ringing signal (ringtone), but is usually not played synchronously.

3. Ringdroid - Wikipedia

   en.wikipedia.org/wiki/Ringdroid

   Java, XML (content language) Operating system. Android 1.5+. License. Apache 2.0. Website. github .com /google /ringdroid. Ringdroid is an open source Ringtone creation utility application that runs on the Android Operating System. Ringdroid lets users record and edit audio files for use as ringtones, alarms or notifications.

4. AT&T Mobility - Wikipedia

   en.wikipedia.org/wiki/AT&T_Mobility

   SBC Wireless had previously operated in several northeast markets under the "Cellular One" brand, while BellSouth's wireless operations incorporated the former Houston Cellular. Cingular's lineage can be traced back to Advanced Mobile Phone Service , which was a subsidiary of AT&T created in 1978 to provide cellular service nationwide.

5. 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 countryv—AT&T Mobility, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.

6. Verizon - Wikipedia

   en.wikipedia.org/wiki/Verizon

   Verizon Communications Inc. (/ v ə ˈ r aɪ z ən / və-RY-zən), is an American telecommunications company headquartered in New York City. [3] It is the world's second-largest telecommunications company (after China Mobile) by revenue and its mobile network is the largest wireless carrier in the United States, with 114.8 million subscribers as of March 31, 2024.

7. Ringing (telephony) - Wikipedia

   en.wikipedia.org/wiki/Ringing_(telephony)

   Ringing (telephony) Ringing is a telecommunication signal that causes a bell or other device to alert a telephone subscriber to an incoming telephone call. Historically, this entailed sending a high-voltage alternating current over the telephone line to a customer station which contained an electromagnetic bell.