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SIM Card: Have you ever wondered how a small SIM card can be used to make calls across the world?

SIM Card Technology: Calling system is amazing. It connects everyone, be it friends or strangers. In the olden days, letters used to connect people. Today, 'call' is carrying on this tradition. Or ...
The Financial Express

Explainer: How SIM binding will disrupt your chats

The cellular operators Association of India (COAI), which represents all three private telecom companies— Airtel, Reliance ...