In a move aimed at simplifying mobile connectivity and improving user convenience, Bharat Sanchar Nigam Limited (BSNL) has rolled out a new doorstep SIM card delivery service. The state-owned telecom ...

Most mobile phones rely on a small card called a SIM (subscriber identity module) to make phone calls and send text messages. Without it, your phone isn't able to connect with the cellular network and ...

These two ways of connecting your phone to a cellular network are very different. We tell you about each and how you can switch from one to another. I started my career with CNET all the way back in ...