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"Trai, Telecom companies, Mobile Number Portability, SMS facility,  Tari offer, Voucher value, Telugu News, News in Telugu, Latest Telugu News"
<https://tv9telugu.com/technology/trai-to-telecom-companies-allow-portability-out-sms-facility-irrespective-of-tariff-offer-and-voucher-value-592275.html>