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2. Ringtone - Wikipedia

   en.wikipedia.org/wiki/Ringtone

   A ringtone maker is an application that converts a user chosen song or other audio file for use as a ringtone of a mobile phone. The ringtone file is installed in the mobile phone either by direct cable connection, Bluetooth, text messaging, or e-mail. On many websites, users may create ringtones from digital music or audio.

3. DTMF - Wikipedia

   en.wikipedia.org/wiki/DTMF

   DTMF keypad layout Combination of 1209 Hz and 697 Hz sine waves, representing DTMF "1". The DTMF telephone keypad is laid out as a matrix of push buttons in which each row represents the low frequency component and each column represents the high frequency component of the DTMF signal.

4. The Mosquito - Wikipedia

   en.wikipedia.org/wiki/The_Mosquito

   The sound was made into a mobile phone ringtone, which could not be heard by teachers if the phone rang during a class. [13] Mobile phone speakers are capable of producing frequencies above 20 kHz. [14] This ringtone became informally known as "Teen Buzz" [15] or "the Mosquito ringtone" and has since been sold commercially.

5. Ringing tone - Wikipedia

   en.wikipedia.org/wiki/Ringing_tone

   Patents for personalized ringing tone delivery systems were first filed in Korea by Kang-seok Kim (10-1999-0005344) in October 1999 and in the United States by Mark Gregorek et al. (U.S. patent 5,321,740), and Neil Sleevi (U.S. patent 4,811,382). The first functional ringing tone replacement system was invented by Karl Seelig (U.S. patents ...

6. Nokia tune - Wikipedia

   en.wikipedia.org/wiki/Nokia_tune

   The Nokia tune is a phrase from a composition for solo guitar, Gran Vals, composed in 1902 by the Spanish classical guitarist and composer Francisco Tárrega. [1] It has been associated with Finnish corporation Nokia since the 1990s, becoming the first identifiable musical ringtone on a mobile phone; Nokia selected an excerpt to be used as its default ringtone.

7. Download and install the AOL app on iOS - AOL Help

   help.aol.com/articles/aol-app-downloading-and...

   Stay on top of your email, news, and weather while on the go! Learn more about the AOL app and download it from the App Store.The AOL app is available for iOS devices running iOS 12 or newer.