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  2. Sidetone - Wikipedia

    en.wikipedia.org/wiki/Sidetone

    One of the benefits of sidetone-enabled phones is that a user knows a call has been dropped or ended if he or she no longer hears sidetone. Comfort noise provides a similar benefit. Sidetone is disabled when telephones are running in speakerphone mode to prevent direct acoustical feedback from the speaker to the microphone, resulting in howling ...

  3. List of Apple codenames - Wikipedia

    en.wikipedia.org/wiki/List_of_Apple_codenames

    This list of Apple codenames covers the codenames given to products by Apple Inc. during development. The codenames are often used internally only, normally to maintain the secrecy of the project. The codenames are often used internally only, normally to maintain the secrecy of the project.

  4. Special information tone - Wikipedia

    en.wikipedia.org/wiki/Special_information_tone

    (low) 1370.6 Hz The interval between the segments of SITs is between 0 and 4 ms . To minimize the number of callers who may abandon the call without listening to the announcement, the nominal time gap between the third tone segment and the beginning of the announcement is set as close to zero as possible, with an allowed maximum of 100 ms .

  5. What 'secret' loudspeaker codes mean at department stores - AOL

    www.aol.com/news/2010-10-13-what-secret...

    This "code" is one of many innocuous sounding secret codes that. If you've been shopping in a big box retail store you've probably heard an announcement on the loudspeaker such as, "code yellow ...

  6. How to clean your iPhone speakers - AOL

    www.aol.com/clean-iphone-speakers-140000090.html

    This can result in your iPhone's speakers sounding distorted and muffled, whether for media playback or during phone calls. We're taking a look at the "do's" and "don'ts" of how to get your iPhone ...

  7. Type Allocation Code - Wikipedia

    en.wikipedia.org/wiki/Type_Allocation_Code

    The Type Allocation Code (TAC) is the initial eight-digit portion of the 15-digit IMEI and 16-digit IMEISV codes used to uniquely identify wireless devices. The Type Allocation Code identifies a particular model (and often revision) of wireless telephone for use on a GSM , UMTS , LTE , 5G NR , iDEN , Iridium or other IMEI-employing wireless ...

  8. iPhone 6 - Wikipedia

    en.wikipedia.org/wiki/IPhone_6

    The most significant changes to the iPhone 6 and iPhone 6 Plus are its displays; both branded as "Retina HD Display" and "ion-strengthened", the iPhone 6 display is 4.7 inches in size with a 16:9 resolution of 1334x750 (326 ppi, minus one row of pixels), while the iPhone 6 Plus includes a 5.5-inch 1920x1080 display (401 PPI). The displays use a ...

  9. Intercept message - Wikipedia

    en.wikipedia.org/wiki/Intercept_message

    A message may also be played when 0 or 1 followed by an area code is prepended unnecessarily on landline phone calls to local destinations. As of 2021, area code dialing is required in multi area code areas even for local calls, making the "not necessary to dial a 1 or 0" message no longer relevant for some areas.