Emergency Calls

Making calls without Sim card...
Oops it looks weird right!!! But, yes its true one can make call without sim card in mobile. There are some emergency numbers available in India on which you can call. Obviously we cannot make personal calls as they are blocked by service providers but we can use Emergency numbers.
Emergency numbers available in India are 100 for police, 108 or 112 for medical help and 101 in case of fire. Trace mobile number Emergency calls have their own menu through which we can call even if screen is locked. In Smartphone even if screen is pattern or pin protected option for emergency call is available.
Does Emergency number works without sim card?
Yes, obviously it works!!
To make an emergency call we don’t need sim card because this sim card only contains information like our phone number and carrier information and user is registered to that number or not. So, in case of emergency these numbers will directly redirect you to emergency helpdesk without need of carrier information.
Even if you are in cave these will work as SIM cards hold user credentials for authentication and billing information, but aren't required to actually make the connection to the network.