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Some mobile phone service providers offer mobile Internet service to other devices via a data connection from the mobile phone. Also known as tethering , one can interface to their phone either wirelessly using Bluetooth or Wi-Fi or wired via cable allowing access to the Internet anywhere there is a cell network signal.
The antennas contained in mobile phones, including smartphones, emit radiofrequency (RF) radiation (non-ionizing "radio waves" such as microwaves); the parts of the head or body nearest to the antenna can absorb this energy and convert it to heat or to synchronised molecular vibrations (the term 'heat', properly applies only to disordered molecular motion).
A sound-powered telephone is a communication device that allows users to talk to each other with the use of a handset, similar to a conventional telephone, but without the use of external power. This technology has been used since at least 1944 [ 1 ] for both routine and emergency communication on ships to allow communication between key ...
Wi-Fi Direct has become a standard feature in smart phones and portable media players, and in feature phones as well. [8] The process of adding Wi-Fi to smaller devices has accelerated, and it is now possible to find printers, cameras, scanners, and many other common devices with Wi-Fi in addition to other connections, like USB.
Closed public networks use a HotSpot Management System to control access to hotspots. This software runs on the router itself or an external computer allowing operators to authorize only specific users to access the Internet. [17] Providers of such hotspots often associate the free access with a menu, membership, or purchase limit.
Vitaphone was a sound film system used for feature films and nearly 1,000 short subjects made by Warner Bros. and its sister studio First National from 1926 to 1931. Vitaphone is the last major analog sound-on-disc system and the only one that was widely used and commercially successful.
The suction cup is the most basic system and is found on entry-level speakers. Its main disadvantage is poor adhesion to the shower wall, which can cause the unit to fall off. The mounting bracket is the safest system to fix the speaker, but requires drilling a hole in the wall. The carabiner clip allows the speaker to hang from the shower ...
The system offers seamless handoff, so the user can move from cell to Wi-Fi and back again with the same invisibility that the cell network offers when moving from tower to tower. [3] Since the GAN system works over the internet, a UMA-capable handset can connect to its service provider from any location with internet access.