Why in news?
State‑owned telecom operator Bharat Sanchar Nigam Limited (BSNL) announced on 1 January 2026 that it had rolled out Voice over WiFi service across India. The new facility allows BSNL customers to make voice calls and send messages using any Wi‑Fi network, improving connectivity in homes, offices and remote areas with weak mobile signals. BSNL said the service would be free of extra charge and works seamlessly with existing phone numbers.
Background
VoWiFi uses Internet Protocol Multimedia Subsystem (IMS) technology to route voice calls through Wi‑Fi rather than the traditional cellular network. Unlike over‑the‑top apps such as WhatsApp or Skype, Wi‑Fi calling is built directly into the phone’s dialler and messaging interface. The call is authenticated by the mobile operator and can automatically hand off to the cellular network when the user leaves Wi‑Fi coverage.
Benefits
- Better indoor coverage: Wi‑Fi signals often penetrate buildings better than cellular signals, providing clear calls in basements, high‑rise apartments and rural homes.
- Network decongestion: Offloading voice traffic to Wi‑Fi frees up the cellular network, improving service quality for all users.
- Cost savings: Calls made over Wi‑Fi do not consume mobile voice minutes. BSNL’s service is offered at no additional cost to subscribers.
- Seamless handover: The technology enables calls to switch between Wi‑Fi and mobile networks without dropping, ensuring uninterrupted conversations.
How to use the service
- Subscribers need a VoWiFi‑capable smartphone and an active BSNL SIM card.
- Enable Wi‑Fi Calling in the phone’s network settings and connect to a stable Wi‑Fi network.
- Dial numbers or send texts as usual; the device will automatically use Wi‑Fi when available.
Conclusion
BSNL’s nationwide launch of VoWiFi brings modern calling features to millions of customers, particularly in rural and hilly areas where traditional cell towers struggle to provide consistent coverage. As more devices support Wi‑Fi calling, the service could help bridge the digital divide.
Source: PIB