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  2. Textfree - Wikipedia

    en.wikipedia.org/wiki/Textfree

    textfree .us. TextFree (formerly called Pinger and sometimes stylized as textfree) is a mobile application and web service that allows users to send and receive text messages, as well as make and receive VoIP phone calls, for free over the internet. The service costs nothing because it is supported by ads, but users have the option of paying ...

  3. Text messaging - Wikipedia

    en.wikipedia.org/wiki/Text_messaging

    There are a growing number of websites that allow users to send free SMS messages online. Some websites provide free SMS for promoting premium business packages. Worldwide use Europe SMS is used to send "welcome" messages to mobile phones roaming between countries.

  4. SMS spoofing - Wikipedia

    en.wikipedia.org/wiki/SMS_spoofing

    SMS spoofing is a technology which uses the short message service (SMS), available on most mobile phones and personal digital assistants, to set who the message appears to come from by replacing the originating mobile number (Sender ID) with alphanumeric text.

  5. How to Do a Free Reverse Phone Lookup & the 8 Best ... - AOL

    www.aol.com/finance/free-reverse-phone-lookup-8...

    Have you ever wondered who owns that phone number? You know, the one that keeps calling you and won't leave you alone? Try a free reverse phone lookup site to find out who's calling.

  6. SMS - Wikipedia

    en.wikipedia.org/wiki/SMS

    By the end of 2010, SMS was the most widely used data application, with an estimated 3.5 billion active users, or about 80% of all mobile phone subscribers. The service allows users to send and receive messages of up to 160 characters (when entirely alpha-numeric) to and from GSM mobiles.

  7. Mobile phone spam - Wikipedia

    en.wikipedia.org/wiki/Mobile_phone_spam

    One of the biggest sources of SMS spam is number harvesting carried out by Internet sites offering "free" ring tone downloads. In order to facilitate the downloads, users must provide their phones' numbers; which in turn are used to send frequent advertising messages to the phone.

  8. Comparison of cross-platform instant messaging clients

    en.wikipedia.org/wiki/Comparison_of_cross...

    Email or Phone number Yes No No No No Element: No Yes Yes: No Yes Yes Fractal: No No Yes Yes Gadu-Gadu: Email and Phone number No No Gajim: Email Yes No Yes Google Chat: Email; Google account Yes Google Messages (RCS) Phone number Similar to SMS requirements, RCS messaging requires a valid SIM card to be inserted in the device.

  9. Short Message service center - Wikipedia

    en.wikipedia.org/wiki/Short_message_service_center

    A Short Message Service Center ( SMSC) is a network element in the mobile telephone network. Its purpose is to store, forward, convert and deliver Short Message Service (SMS) messages. The full designation of an SMSC according to 3GPP is Short Message Service - Service Center (SMS-SC).

  10. iMessage - Wikipedia

    en.wikipedia.org/wiki/IMessage

    iMessage allows users to send texts, documents, photos, videos, contact information, and group messages over the Internet to other iOS or macOS users. iMessage is an alternative to the SMS and MMS messaging for most users with devices running iOS 5 or later.

  11. Signal (messaging app) - Wikipedia

    en.wikipedia.org/wiki/Signal_(messaging_app)

    Signal uses mobile telephone numbers to register and manage user accounts, though configurable usernames were added in March 2024 to allow users to hide their phone number from other users. After removing support for SMS on Android in 2023, the app now secures all communications with end-to-end encryption. The client software includes ...