simcard – Can you connect to a Mobile Network without a sim?

I know this may sound a silly question, but i know during emergency calls we can connect to our mobile networks without using a sim and make calls.
So it’s technically possible to connect.
The SimCard hold crypted info on how to authenticate to the mobile network.
So my question is: if we would have access to the crypted data of the sim,it would be possible to connect to the mobile network without using the sim, but instead inserting manually the information on the device ? All of this without an internet connection ? Can this be done on a common phone?