El Cajon is a city in San Diego County, California, United States, 17 mi east of Downtown San Diego. The city takes its name from Rancho El Cajón, which was in turn named for the box-like shape of the valley which surrounds the city, which is also the origin of the city's common nickname of "The Box"."
Mobile phone users are unlikely to get a respite from the menace of pesky commercial calls and text messages anytime soon as the majority of these come from unregistered telemarketers (UTMs) using personal mobile numbers that are almost impossible to monitor or bar, say senior telco executives.
The exercise of the Telecom Regulatory Authority of India (Trai) to implement distributed ledger technology (DLT) to check fraudulent messages has so far been a failure since it has not been able to curb the menace, Route Mobile chief executive Rajdip Gupta told ET.
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