"The No Objection Certification (NOC) shall be issued initially for a period of three years and shall be renewed on the request of company for further period of three years," a DoT circular on sale or renting international roaming SIM cards or global calling cards said.
Earlier, companies that sell or rent international sim cards were required to take NOC every year.
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As per DoT data, there are about 70 companies in the country involved in this business. These firms can sell international SIM cards in India for their use outside country only.
These connection are generally purchased by people travelling abroad.