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How to Make Calls Without a SIM Card? BSNL is Innovating Mobile Communication with New Technology

An image depicting BSNL's new Direct-to-Device (D2D) service, showcasing the satellite communication technology that allows users to make audio and video calls without needing a SIM card, highlighting its compatibility with smartphones and smart devices for enhanced connectivity in remote regions.

BSNL

As BSNL gears up to launch its Direct-to-Device (D2D) service in India, users can anticipate a transformative shift in mobile communication that removes the reliance on traditional mobile networks and SIM cards. BSNL has successfully completed trials of its D2D technology in collaboration with Viasat, a global satellite communication firm. This innovative development allows users to make audio and video calls without needing a SIM card or conventional network, with compatibility for Android and iOS smartphones, smartwatches, and various smart devices. The technology is designed to ensure seamless connectivity, even in remote areas or during network outages.

According to Viasat, Direct-to-Device connectivity represents a groundbreaking advancement that enables devices like mobile phones, smartwatches, and even vehicles to connect directly to satellite networks. This technology supports both personal and device communications, promising reliable connectivity regardless of geographical location. The introduction of D2D is set to enhance coverage and communication reliability, particularly in remote and underserved regions.

The Direct-to-Device service relies on satellite communication, allowing devices to connect directly without the necessity of mobile towers or wired networks. Similar to satellite phones, this new technology facilitates communication between smartphones, smartwatches, and other smart devices.

During the trial phase, BSNL and Viasat successfully tested two-way messaging and SOS messaging on a commercial Android smartphone utilizing Non-Terrestrial Network (NTN) connectivity. They managed to conduct a phone call using a satellite positioned approximately 36,000 kilometers away, marking a significant milestone toward uninterrupted communication.

With the successful trials of D2D technology, BSNL is now in a position to compete with major telecom players such as Airtel, Jio, and Vodafone-Idea in the satellite connectivity arena. Airtel recently demonstrated a satellite internet service at the India Mobile Congress 2024, while Jio is also developing similar technology. BSNL's trial showcased the potential of direct satellite connections in emergency situations.

As the Indian government plans to allocate spectrum for satellite internet, various players, including Airtel, Jio, Vi, and even Elon Musk's Starlink, are expected to enter the market, providing satellite-based internet services. Viasat has claimed that it demonstrated direct-to-device satellite connectivity in India for the first time in collaboration with state-owned BSNL.

The D2D connectivity allows commonly used devices—such as mobile phones, smartwatches, and vehicles—as well as industrial machinery and transport operators to connect effortlessly to both terrestrial and satellite networks without needing dedicated hardware for satellite connections.

Viasat successfully showcased two-way messaging and SOS functionality using a commercial Android smartphone equipped for NTN connectivity during the trial. Messages were sent to one of Viasat's geostationary L-band satellites, validating the feasibility of satellite services for mobile connectivity among Indian consumers and businesses.

Viasat is working alongside BSNL to enhance satellite services for consumer and IoT devices globally. Sandeep Moorthy, Viasat's Chief Technical Officer, stated that D2D technology could help overcome barriers to accessing satellite connectivity, particularly in India, where millions lack reliable terrestrial connectivity.

"In the future, D2D could help transform the Indian production and supply chain to be more efficient, sustainable, and safer, while supporting automotive applications for improved safety and condition-based maintenance," Moorthy remarked.

Together with partners like BSNL, Viasat is committed to establishing a standards-based, open, and collaborative D2D ecosystem to deliver seamless connectivity experiences, regardless of the location of a person, device, or vehicle.

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