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WhatsApp (officially WhatsApp Messenger) is an instant messaging (IM) and voice-over-IP (VoIP) service owned by technology conglomerate Meta. [14] It allows users to send text, voice messages and video messages, [15] make voice and video calls, and share images, documents, user locations, and other content.
A valid phone number or email address is not required for registration & login. However, the mobile app serves as the primary device, due to the end-to-end encryption architecture. [121] Yes No No No Trillian: No Yes No No Yes Viber: Phone number No No No No WeChat: Phone number or QQ number No No No No No WhatsApp: Phone number No Yes No No No ...
Irrespective of the type of numbering plan, "shorthand" or "speed calling" numbers are automatically translated to unique telephone numbers before the call can be connected. Some special services have special short codes (e.g., 119, 911, 100, 101, 102, 000, 999, 111, and 112 being the emergency telephone numbers in many countries).
Duo is based on phone numbers, allowing users to call someone from their contact list. The app automatically switches between Wi-Fi and cellular networks. A "Knock Knock" feature lets users see a live preview of the caller before answering. An update in April 2017 lets users worldwide make audio-only calls.
WhatsApp also uses artificial intelligence systems to scan unencrypted data collected from users (profile image and status; phone number, IMEI and OS; names and images of the user's WhatsApp groups; a list of the user's electronic devices [clarification needed]; any Facebook or Instagram accounts) and compares it against suspicious patterns or ...
Google provides free PC-to-PC voice calling worldwide. As described above, Google Voice users in many countries may make low-cost calls to international phone numbers, and currently may also make free PC-to-phone calls within the United States and Canada. Vincent Paquet, a co-founder of GrandCentral who became a senior product manager at Google ...
This is a list of international dialing prefixes used in various countries for direct dialing of international telephone calls.These prefixes are typically required only when dialling from a landline, while in GSM-compliant mobile phone (cell phone) systems, only the symbol + before the country code may be used [citation needed] irrespective of where the telephone is used at that moment; the ...
A virtual number is a telephone number that is not directly associated with a telephone line. It is used to forward incoming calls to one or more pre-set telephone numbers chosen by the client. Virtual numbers are often used for privacy reasons, as they allow users to keep their personal phone numbers private while still receiving calls.