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Unlocking the bootloader allows installing and running unsigned code on a device, including user customized software. Operating outside the manufacturer specification might usually result in voiding any warranties and may make the device susceptible to data theft, as the integrity of the operating system (as intended by the manufacturer) can no longer be guaranteed. [1]
Customer proprietary network information (CPNI) is the data collected by telecommunications companies about a consumer's telephone service. [1] It includes the time, date, duration and destination number of each call, the type of network a consumer subscribes to, and certain other information that appears on the consumer's telephone bill. [2]
TracFone Wireless, Inc. (TFWI) is an American wireless prepaid service provider. It is a mobile virtual network operator offering prepaid and no-contract services on the Verizon network under multiple brands, including TracFone, Straight Talk Wireless, Total Wireless, Simple Mobile, SafeLink Wireless, and Walmart Family Mobile in partnership ...
Calls can also be dropped if a mobile phone at the other end of the call loses battery power and stops transmitting abruptly. Sunspots and solar flares are rarely blamed for causing interference leading to dropped calls, as it would take a major geomagnetic storm to cause such a disruption (except for satellite phones ).
A common method is to direct all World Wide Web traffic to a web server, which returns an HTTP redirect to a captive portal. [8] When a modern, Internet-enabled device first connects to a network, it sends out an HTTP request to a detection URL predefined by its vendor and expects an HTTP status code 200 OK or 204 No Content.
Calls initiated on Wi-Fi by non-VoLTE devices will transfer calls to the LTE network if Wi-Fi coverage becomes too weak to sustain the call, although they are unable to initiate calls on LTE. As a result of the Merger with T-Mobile US , the Sprint LTE network was shut down on June 30, 2022.
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Prohibits any call made using automated telephone equipment or an artificial or prerecorded voice to an emergency line (e.g., "911"), a hospital emergency number, a physician's office, a hospital/health care facility/elderly room, a cellular telephone, or any service for which the recipient is charged for the call.