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If you need help, hang up and then dial your operator. This is a recording."). A single burst of off-hook tone is sometimes used to indicate to a party that the call is being transferred , notably at 1-800- BELL-SOUTH (800-235-5768).
Australia uses up to three different combinations of frequencies. The example shown is created by mixing 400, 425, and 450 Hz sine waves. Hong Kong uses the North American 440 Hz and 480 Hz tone, with a slightly different cadence, using a 3-second pause between the double rings.
Cellphone surveillance (also known as cellphone spying) may involve tracking, bugging, monitoring, eavesdropping, and recording conversations and text messages on mobile phones. [1] It also encompasses the monitoring of people's movements, which can be tracked using mobile phone signals when phones are turned on.
As of 2007, text messaging was the most widely used mobile data service, with 74% of all mobile phone users worldwide, or 2.4 billion out of 3.3 billion phone subscribers, being active users of the Short Message Service at the end of 2007. In countries such as Finland, Sweden, and Norway, over 85% of the population used SMS.
SMS language displayed on a mobile phone screen. Short Message Service language, textism, or textese [a] is the abbreviated language and slang commonly used in the late 1990s and early 2000s with mobile phone text messaging, and occasionally through Internet-based communication such as email and instant messaging.
Only the first 160 characters of an email message can be delivered to a phone, and only 160 characters can be sent from a phone. However, longer messages may be broken up into multiple texts, depending upon the telephone service provider. [91] [92] Text-enabled fixed-line handsets are required to receive messages in text format.
Here's what you need to know. The post If These Apps Are Still on Your Phone, Someone May Be Spying on You appeared first on Reader's Digest.
Hidden messages include backwards audio messages, hidden visual messages and symbolic or cryptic codes such as a crossword or cipher. Although there are many legitimate examples of hidden messages created with techniques such as backmasking and steganography , many so-called hidden messages are merely fanciful imaginings or apophany .